EP2906900A1

EP2906900A1 - Firing practice method

Info

Publication number: EP2906900A1
Application number: EP13773259.0A
Authority: EP
Inventors: Jean-Michel Laporte; Jean-Marc Fouques
Original assignee: Laporte Holding SAS
Current assignee: Laporte Holding SAS
Priority date: 2012-10-10
Filing date: 2013-10-07
Publication date: 2015-08-19
Anticipated expiration: 2033-10-07
Also published as: US20160040966A1; WO2014056822A1; FR2996633B1; EP2906900B1; FR2996633A1; CA2887626A1

Abstract

The subject of the present invention is a method for carrying out firing practice, comprising a step of launching a target (1) into a portion of space, a step of firing a projectile towards the target (1) and a step of impact of the projectile on the target (1), characterized in that use is made of a projectile comprising a shell delimiting an internal volume containing a marking material and in that it involves a step of rupturing the shell upon impact of the projectile with the target (1), thereby releasing the marking material.

Description

"Shooting exercise method"

The present invention relates in particular to a method and a system of exercise shooting. It also relates to a target and a device associating target and projectile for shooting.

A preferred application is the target launching industry and shooting industry, including the weapons and projectile industry.

BACKGROUND

The typical discipline of shooting exercise is the Bail Trap.

In the latter area, there are known target launching devices often referred to as clay pigeons. The shooter is equipped with a rifle associated with cartridges containing pellets of caliber adapted to the desired shot. In both training and competition, the Bail Trap practice consists of a shot of a pigeon that the shooter tries to reach for the shots to dislocate. This dislocation provides a visual effect allowing the shooter and the eventual public to validate that the target has been hit. In some cases, the visual effect can be accentuated by the use of specific pigeons, containing a powdery material such as calcium carbonate. At the rupture of the target, the powdery material is dissipated into space surrounding the impact zone, producing a cloud, possibly colored according to the color of the powder material. The document US-A1-20020125643 is part of such targets containing a marker material.

The visual effect produced by this technique is satisfactory but involves the consumption of many targets, the cost of which is relatively high for consumables, and whose environmental impact, once the pigeons are destroyed and strewn on the ground, is not not always negligible.

The invention solves all or part of the disadvantages of current techniques.

SUMMARY OF THE INVENTION

According to a first aspect of embodiments, it relates in particular to a method of firing practice, comprising a step of launching a target in a portion of the space, a firing step of a projectile towards the target and a projectile impact step on the target.

Advantageously, this method is such that a projectile comprising a shell delimiting an interior volume containing a marker material and that it comprises a step of rupture of the shell during the impact of the projectile on the target, so that to release the marker material

This arrangement makes it possible to use reusable targets since the projectile is caused to break. The visual effect is preserved because of the dynamic aspect of the operation of the invention: the movement of the target ensures, at the moment of impact, a distribution of the marker in space, and in particular over a large area of the target and / or around it. While current techniques focus on the destruction of the target, the invention adopts a reverse approach.

According to a non-limiting possibility, the launching step comprises a self-rotation of the target. An advantage produced by this aspect of the invention is that the point of impact of the projectile is then the locus of a movement having a tangential component on the surface of the target, in addition to the movement of the target along its launch trajectory. This causes a marked increase in the marker release zone.

Another aspect of embodiments of the invention also relates to a system for firing practice, comprising a target and a projectile intended to impact the target, characterized in that the projectile comprises a shell delimiting an interior volume containing a target. marking material and thereby the impact of the projectile on the target is configured to cause the rupture of the hull, so as to release the marker material. The system may also include a target launcher.

Another aspect of embodiments of the invention relates to a firing target. In a preferred case, the edge of the target has a lower density than the impact surface. While the targets of Bail Trap are of a single block of the same density, the invention stands out clearly, especially since it uses one or less dense materials at the level of the slice, area where we would place more naturally a high density material for reasons of mechanical strength. Advantageously, the firing target comprises a peripheral surface comprising a slice joining a first face and a second face and an impact surface formed on at least one of the first face and the second face, capable of receiving the impact of a projectile, characterized in that the edge of the target and the impact surface are of different materials, the density of the material or materials of the wafer being less than the density of the material or materials of the impact surface.

Another aspect of embodiments of the invention is a device comprising a target and a projectile.

BRIEF INTRODUCTION OF FIGURES

Other features, objects and advantages of the present invention will appear on reading the detailed description which follows, and with reference to the appended drawings given as non-limiting examples and in which:

Figure 1 shows in perspective an example of a target used according to the present invention.

Figure 2 illustrates a possibility of mounting a portion of the target on the rest of the target.

Figure 3 shows an alternative to the embodiment of Figure 2 for mounting a portion of the target on the rest of the target.

FIG. 4 is a cross-sectional view along a diameter of the target according to the embodiment of FIG. 3.

Figure 6 shows in perspective another embodiment of the target and Figure 5 is a transverse view along a diameter of the target.

Figures 7 to 9 show in perspective an embodiment of launcher can be part of the present invention, Figures 7 to 9 showing different phases of operation of said machine. DETAILED DESCRIPTION

Before going into the details of embodiments of the invention with reference to the figures, the following are optional features that can be implemented in a combined or alternative way:

the own rotation speed of the target 1 is at least 300 revolutions per minute at the time of the launch and / or at the moment of the impact;

a target (1) is used whose peripheral surface comprises a wafer (2) joining a first face (3) and a second face (4) and the impact step is performed by contacting the projectile on a surface of impact (8) formed on at least one of the first face (3) and the second face (4);

the slice (2) of the target (1) and the impact surface (8) are chosen from different materials;

the material or materials of the wafer (2) is chosen with a density lower than the density of the material or materials of the impact surface (8);

the density of the material or materials of the impact surface (8) is chosen to be greater than 500 kg / m ³ ;

the density of the material or materials of the wafer (2) is less than 275 kg / m ³ ;

a target (1) comprising a target body (12) of cylindrical shape whose surface of revolution forms the wafer (2) and the impact surface (8) comprises, on at least one of the first face (3) and the second face (4), a disk-shaped area;

the diameter of the disk-shaped area is smaller than the diameter of the target body (12);

a target (1) is used whose body (12) is made of polymeric foam and at least a portion of the impact surface (8) is made by cross-linking said foam;

forming at least a portion of the impact surface (8) by attaching a coating (10) to the target body (12);

the fixing is carried out with at least one fixing member (1 1) situated on one face of the coating (10) opposite to the face of the coating (10) forming at least partly the impact surface (8), and with at least one complementary fastening member (13) formed on the target body (12);

- The target comprises two coatings each fixed on a different face and each associated with at least one fastener, the fasteners of the two coatings being configured to be secured in a space within the thickness of the target body.

the coating (10) is a plate of polymeric material; a target (1) is used comprising a belt of which a peripheral part forms the wafer (2) of the target (1) and surrounding a target core (15), and the outer wall of the target core (15) forms at least in part the impact surface (8).

the target core (15) has a portion for fixing a zone of the belt (14) opposite to the peripheral part;

the target core (15) comprises a central core (16) chosen with a thickness less than that of the fixing portion;

the Young's modulus of the material or materials of the wafer (2) is chosen to be smaller than that of the material or materials of the impact surface (8);

the Young's modulus of the material or materials of the slice is less than 0.1 giga

Pascal;

the coating is a sheet of elastomeric material;

the Young's modulus of the material or materials of the impact surface (8) is chosen greater than 0.8 giga Pascal;

the marker of the projectile is chosen from a liquid dye and a powder;

the shell of the projectile is made in the form of a rigid shell made of polymeric material or in the form of a flexible shell, preferably of gelatin;

- The shell is formed as a smooth spherical envelope.

the device comprises a target and a projectile comprising a shell delimiting an interior volume containing a marker material.

- The target preferably has a peripheral surface having a slice joining a first face and a second face and an impact surface formed on at least one of the first face and the second face, adapted to receive the impact of a projectile, the edge of the target and the impact surface being of different materials, the density of the material or materials of the slice being less than the density of the material or materials of the impact surface.

the slice of the target is configured to absorb the energy of a projectile impact in a greater proportion than the impact surface.

the target and the projectile are configured so that the projectile absorbs more than 60% of the energy generated by an impact of the projectile on the impact surface.

One aspect of the invention is related to launching a target in a portion of the space. A launching machine is provided and a non-limiting example of embodiment is given in FIGS. 7 to 9.

In these figures, the machine 19 has a launching surface advantageously in the form of a plane 20 for receiving at least one target 1 in contact with one of the faces 3, 4 of the target 1. The launching plane 20 can be horizontal or inclined, in particular to vary the projection effects of the target and the area of the space in which the target is projected. For this purpose, the machine 19 may be provided with means for tilting it. When a target 1 is on the launch plane 20, its launch is achieved by means of an ejection device here in the form of an arm 21 rotatably mounted about an axis x2. In the example, the arm 21 is configured to be applied on a portion of wafer 2 of the target 1 to give it a kinetic energy to send it. It is possible to use a cocking system for the arm 21 and in particular a system as used in ballooning machines, for example involving a spring tensioned by an operator and expanded on command to produce a rapid rotation of the arm 21. during the launch phase. The machine 19 further comprises a peripheral application surface 22 of the target 1 and adapted to cooperate with the slice 2 of the target 1. In this way, the target 1 can be guided during its movement on the launch plan 20 until ejection. In addition, the surface 22 may constitute an adhesion zone which allows in a preferred embodiment to effectively put the target 1 in clean rotation. We will see later the interest of this own rotation to produce an increased visual technical effect. The shape of the application surface 22 is not limited but is preferably curvilinear with a comma profile.

The components previously described for the machine 19 are, in the case of Figures 7 to 9, mounted on a frame 23. The frame 23 can be articulated so as to produce the aforementioned inclination means and in particular to have an articulation capacity in rotation along at least one axis.

To allow the exercise of shooting with successive targets, the machine 19 advantageously comprises a plurality of targets stored in a charger 24. In the case shown, the charger 24 is substantially equivalent to those used to launch targets of the "pigeon dart" type. "clay" and comprises for this purpose at least one column 25 for the superposition of the targets 1 during storage and has a delivery zone 26 in the lower part of the or columns 25, so that, on command, a target 1 can be evacuated from the column 25 which stored it to be directed towards the launching plane 20. This target path 1 can be operated by gravity and / or thrust system.

The target 1 used in the invention may have different shapes and configurations. However, in view of the above with reference to the launching machine 19, it is advantageous for the target 1 to have an outer periphery in the form of a slice 2 of substantially circular shape. In addition, it is advantageous for the target 1 to have an axial symmetry along the axis through which it is brought to be setting in own rotation. The symmetry can be otherwise central, so that the target 1 is completely balanced around its center.

In addition, the target 1 is preferably reusable and the impact of the projectile does not affect it fundamentally. This does not exclude that impact points persist after the shots, but these alterations are advantageously minor so that the target can operate multiple times.

In general, the target 1 comprises a peripheral wall constituting its outer surface and advantageously having a wafer 2 and a first face 3 and a second face 4. FIG. 1 shows an exemplary embodiment of this invention. target typology 1. In the case illustrated, the first and second faces 3, 4 are substantially planar but this case is not limiting as will be seen later with reference to Figures 5 and 6 in particular. The slice 2 is advantageously in the form of the outer surface of a cylinder of revolution. Thus, in the case of Figures 1 to 4, the target 1 has essentially the shape of a relatively flattened cylinder portion, namely that the height is less than its diameter.

By way of example, both in the embodiment of FIGS. 1 and 2 and in the other embodiments, it is possible to use a target 1 of circular section having a diameter of between 25 and 33 centimeters and a height (dimension in thickness) between 25 and 50 millimeters.

Returning to Figures 1 and 2, the target 1 carries a body 12 preferably based on high or low density polymer foam. By way of example, satisfactory foams of polyethylene or polyvinyl chloride type. The density of these foams is, for example, less than 275 kg / m ³ . Thus, a body 12 of target 1 giving a resistance to the target 1 without forming too much rigidity so as to limit the danger of the launch of the target 1. Moreover, the crushing capacity of the target 1 under In some embodiments, the elastic deformation form at its edge 2 may make it possible to accentuate the effect of self-rotation by means of the launching machine 19.

The target body can be in one piece and in one material or have multiple materials. For example, it is possible to produce a multilayer body 12, in particular with a central layer in the thickness of the body 12 and, on each side of the central layer, a lateral layer made of a material less dense than the central layer.

At the same time, given the need to cause the rupture of a projectile during its impact on the target 1, the latter advantageously comprises an impact surface whose design is defined to ensure rupture. In particular, the impact surface 8 is advantageously configured to limit the absorption of the energy of the impact so that this energy is sufficiently reflected towards the projectile to cause its rupture, that is to say to exceed its limit of resistance to rupture. To achieve this, the impact surface 8 is in the case of Figures 1 and 2 made from at least one coating 10, each coating 10 can cooperate with one of the first and second faces 3, 4.

FIG. 1 shows that the coating 10 may have the shape of a disc that can be applied on a face 3, 4 in a centered manner and delimits an edge 9 on the face 3, 4 equipped so as to preserve a periphery which may be in a less dense material and / or less rigid.

FIG. 2 shows an example of a coating 10 in the form of a sheet of material that is sufficiently flexible to be easily positioned on the face 3. As a preference, the sheet is made of elastomer material which comprises both the elastomeric polymer materials. and natural materials especially rubber. Fixing the web can be done by any mechanical means or by gluing. The outer surface of the sheet thus formed constitutes or participates in constituting the impact surface 8. Advantageously, the material of the sheet is chosen to ensure good cooperation with the projectile.

In one embodiment, the projectile is in the form of a ball or ball having a shell of flexible material and for example gelatin. In this example, the use of an elastomeric coating provides increased frictional capability between the shell of the projectile and the impact surface 8 to facilitate rupture of the shell. Moreover, a coating 10 can be used so as to facilitate cleaning when the shell of flexible material contains a liquid dye product such as paint. The surface of the impact surface 8 is advantageously smooth for this purpose. In this example, it suffices to rub the coating 10 with a cloth to easily remove the paint deposited by the projectile. As an alternative, the coating 10 may be in the form of a rigid polymer material plate attached to one or other of the faces 3, 4.

In the case of FIGS. 3 and 4, the assembly is effected by fixing members cooperating with fastening members 1 1 on the internal face of the coating 10 and complementary members 13 in the target body 12 or another part of target. The complementary members 13 advantageously comprise female housings formed in the target body 12 while the members 1 1 are male parts capable of being inserted into the housings. At least one fastener 1 1 may be formed or more. In the illustrated case, at least four members are located at four cardinal points, so as to distribute the fixing force on the target 1. The fasteners are inserted in the housing and can hang on the wall of the latter. In addition, at least one fastening member January 1 can have a relief on its surface so as to increase the effect of hanging in the complementary fastening member 13. This mounting example can be completed or replaced by any other form fixing and in particular by a collage.

As a variant, FIG. 4 shows in section the result obtained in the embodiment of FIG. 3 with the passage of the fastening members 11 through the thickness of the target body 12. This figure also shows that one can equip each face 3, 4 of the target 1 with a coating 10 so that the impact of the projectile can occur by both sides of the target 1. In this context, it may be advantageous to cooperate the fasteners 1 1 of the two coatings 10. This is the sense of the illustrated case in which each coating 10 carries fasteners, on the one hand in the form of male rods on the other hand in the form of rods having an inner conduit. It is arranged that the rods of the fasteners 1 1 of one of the coatings 10 can be inserted into the inner conduits of the fasteners of the other coating 10 on the opposite side. In this way, the target body 12 is clamped between the two coatings 10 placed on either side of the latter and is fixed together through the thickness as shown in FIG. coating 10 is made of polymeric material, it is advantageously a thermosetting polymer material. By way of example, the coating 10 may be in the following materials: polycarbonate, polyamide or ABS. Still as an example, the thickness of the coating 10 may be in all cases between 0.5 and 3 millimeters and preferably 1 millimeter.

Especially in the case of the use of a projectile having a marker in the form of a coloring liquid, it is advantageous to use a coating 10 having an outer surface of dark color and preferentially black, this makes it possible to accentuate the visual effect by contrast. when the marker is released.

As previously indicated, the embodiment shown in FIGS. 1 to 4 includes a border 9 around the covering 10. The edge 9 can participate in the safety of the exercise of the shot by avoiding making the target too dangerous especially in the case where the coatings are rigid and have a density greater than the density of the target body 12. In this context, by way of example, it will be noted that the thickness of the rim may correspond to between 10 and 30% of the diameter of the faces 3, 4 targets.

Figures 5 and 6 show an alternative embodiment of the target 1 according to the invention. In particular, FIG. 6 reveals that at least one of the faces 3, 4 may not be flat and have, particularly in the example shown, a central cavity surrounded at its periphery by an impact surface portion 8 located at a higher level. This configuration can make it possible to limit the weight of the target 1, but also to promote breakage by proposing surface elements having different orientations so as to avoid too much tangential application of the projectile on the face 3.4 considered. In the case where the coating 10 is of polymeric material, it is advantageously a thermosetting polymer material. By way of example, the coating 10 may be in the following materials: polycarbonate, polyamide or ABS.

The embodiment of FIGS. 5 and 6 comprises a belt 14 capable of constituting a peripheral member for the remainder of the target 1. As an advantage and in the example shown, the belt 14 is in annular form, the outer surface of the ring constituting the slice 2 while the inner surface of the ring allows cooperation with the rest of the target 1. The remainder of the target 1 may comprise, as in the case illustrated, a heart 15 having a portion of cooperation with the belt 14 and a central portion called "soul" 16. In the case shown, the core 16 has a lower thickness That the rest of the heart 15. The peripheral part of the heart 15 comprises an enlargement 17 framing the core 16 and can serve as a basis for the reception of two wings 18 located on either side of the enlargement and appearing at each level. one of the first and second faces 3, 4. The wings 18 are preferably substantially parallel and cooperate with the sidewalls 2 of the belt 14 so that the two elements interlock to form a unitary assembly.

In the case shown, the heart 15 consists of a single piece but this case is not limiting. Similarly, the belt 14 is here monobloc but could be made of several parts assembled.

As in the embodiments previously presented, the case of FIGS. 5 and 6 reveals the ability to select specific materials for constituting the impact surface 8 relative to the surface of the slice 2. In particular, the core 15 can be realized in a material that is denser than the material of the belt 14 and / or a material having a Young's modulus higher than that of the belt 14. This provides an impact surface 8 that promotes the reflection of the energy of the body. impact on the projectile to produce its break while the rest of the target 1 and in particular the material located at its slice 2 is less dense and / or more elastically deformable (less rigid) to limit the risk of accident and promote the rotation by adhesion. In all the cases mentioned above, it is possible to select for unit 2 one or more materials whose Young's modulus is less than or equal to 0.1 Gpa (gigaPascal). In addition or separately, one or more materials may be selected for the impact surface 8, the Young's modulus of which is greater than 0.8 Gpa.

According to one possibility, the impact surface (8) is made of a polymer material and particularly of polyurethane. This material is advantageously chosen to have a Shore hardness of more than 90 and more preferably of at least 99; it may be in the form of a plate of at least 1 mm, and preferably of 1 mm plus or minus 10%.

Another embodiment of the target 1, which is not shown in the figures, consists of a target 1 having a target body 12 substantially as in the case of Figures 1 and 2, to perform a crosslinking of a part of the surface of at least one of the first and second faces 3, 4, so as to harden this portion and form an impact surface 8 absorbing less impact energy than the rest of the body of target 12. It is nevertheless possible to preserve a border 9 around the impact surface 8 during the crosslinking phase by affixing a cover on the surface to be protected during this crosslinking. The impact surface 8 is then formed directly in the target body 12, and advantageously in a polymer foam, but with a transformed material which has mechanical properties different from the rest of the target 1 and which in particular absorbs less the energy of the target. the impact that the rest of the target 1. The crosslinking is preferably done at a depth corresponding to the thickness of the target body. The target 1 thus described ensures both the efficiency and safety of its launch and the effectiveness of cooperation with the projectile. Indeed, the impact surface 8 is advantageously configured in the previous examples to less absorb the energy of the impact than the slice portion 2 of the target 1, so that the energy returned to the projectile is sufficient to cause break the shell and release the marker.

It should be noted that the different target realization possibilities indicated above can be combined according to any combination of their characteristics.

According to the invention, the target 1 is brought to cooperate with a projectile not shown.

As previously indicated, in one embodiment, the projectile comprises a marker in the form of a powdery material which may for example be based on colored calcium carbonate or not. In this example, the shell enclosing the marker is advantageously a rigid shell and preferably a shell of spherical shape. Moreover, the surface of the shell is advantageously smooth so as to promote the accuracy of the shot even if it can penalize the range of the shot. It should be emphasized that the present invention is advantageously aimed at a firing exercise in which the projectile is launched via a weapon that can be part of the present invention, the distance between the weapon and the target being launched being included between ten and twenty meters and advantageously less than fifteen meters.

We therefore preferentially seek to increase the accuracy of the shot rather than the scope of the projectile. The rigid shell, indicated above, may for example be of polymeric material with a thickness of less than one millimeter and advantageously between 0.5 and 1 millimeter and have a diameter of between one and two centimeters and advantageously 1, 5 centimeters. The shell is for example obtained by the following method: a powder mixture of polyethylene glycol and calcium carbonate is placed in a mold in the shape of the desired projectile; the mold is heated to cause a peripheral melting of the mixture; heating is stopped after a delay configured to allow the formation of an envelope layer of the desired thickness after cooling (the cooling may be forced, for example by quenching).

In another embodiment, the shell is of flexible material and for example gelatin. It constitutes a coating delimiting the storage volume of the marker. This solution is particularly suitable, although not limiting, to a marker of the liquid dye type. In this case, the projectile has a more flexible conformation and is made to deform more easily during the impact on the target 1. The flexible shell may be gelatin with a thickness of the same order as the thicknesses given for the case of rigid shells.

The projectile can be launched via a compressed gas weapon that can for example operate on the basis of C0 ₂ and using the C0 ₂ expansion to achieve the projection effort. They may be pistols or rifles.

The practice of shooting practice is as follows:

- the shooter puts himself in position, armed in the hand, the weapon being ready to launch a projectile of the type indicated previously;

- On the order of the shooter or on any other form of command, the machine starts launching a target 1 in a portion of the space. The throw can be configured to expose essentially one of the first or second face 3, 4 facing the shooter, but any other inclination is possible. After the throwing of the target 1, the shooter tries to reach it by means of the projectile. If it succeeds, thanks to the invention, a visual effect is immediately produced by means of the release of the marker. Indeed, during the impact, the projectile sees its hull break so as to release the marker material which spreads rapidly by the dynamics of the target 1. This operates preferentially while ensuring that the target is not substantially degraded and in particular for the energy of the impact to be more widely taken up by the projectile than by the target 1, at least within a limit to break the projectile and not to degrade the target 1. For example, at least three-quarters of the energy of the impact is absorbed by the projectile to promote rupture of the shell;

the marker is released and spreads on the target 1 at the impact surface 8 and / or in a portion of the space. In the case of a marker of the painting type, it is essentially on the target 1 that the marking will be produced. In the case of a powdery material, the marker tends to dissipate as a cloud in a three-dimensional portion of the space. In all cases, it is advantageous to rotate the target 1 about its axis so that during the impact, a tangential effect occurs promoting the distribution of the marker on a larger area. In a certain way, during the impact, the point of impact follows a pseudo-cycloid trajectory which makes it possible to produce this widening of the zone of the visual effect.

The invention can be used for a fire drill in which the shooter repeatedly tries to hit the target 1. For example, the target 1 is launched at a height sufficient to allow a repetitive shooting. Whenever the target is hit, the shooter scores a point. Thanks to the invention, the target 1 is not altered during the impacts and, advantageously, its trajectory is not substantially modified. Therefore, one can for example operate at least 5 shots on a target 1 launched. According to one embodiment of the invention, a system comprising several preferably aligned launching machines is set up. Optionally, the machines can be coordinated with a sequencer capable of defining the order and the intervals (for example between 3 and 10 seconds) of firing of the machines. A firing pattern is as follows: Each machine launches a target in a direction specific to it, the launches are chained in time to not start before the target of the previous throw is no longer accessible to the shooter. Throws allow up to 5 impact possibilities. The player has the ability to score up to 15 points. The number of fencers who can participate in a contest is in no way limited.

The invention is not limited to the previously described embodiments but extends to all embodiments in accordance with his spirit. REFERENCES

1. Target

2. Slice

3. First face

4. Second face

5. Inner layer

6. First layer superficial

7. Second superficial layer

8. Impact surface

9. Border

10. Coating

1 1. Fixing member

12. Target body

13. Complementary fastener

14. Belt

15. Heart

16. Soul

17. Enlargement

18. Wing

19. Launch machine

20. Launch plan

21. Arms

22. Peripheral application area

23. Chassis

24. Charger

25. Column

26. Issuing area

Claims

1. Firing exercise method comprising a step of launching a target (1) in a portion of the space, a firing step of a projectile towards the target (1) and a step of impacting the target projectile on the target (1), characterized in that a projectile comprising a shell delimiting an interior volume containing a marker material and the fact that it comprises a step of rupture of the shell during the impact of the projectile on the target (1), so as to release the marker material.

2. Method according to the preceding claim wherein the launching step comprises a self-rotation of the target (1).

3. Method according to the preceding claim wherein the own rotational speed of the target (1) is at least 300 rpm at the time of casting.

4. Method according to one of the preceding claims wherein there is used a target (1) whose peripheral surface comprises a wafer (2) joining a first face (3) and a second face (4) and wherein the step of impact is achieved by contact of the projectile on an impact surface (8) formed on at least one of the first face (3) and the second face (4).

5. Method according to the preceding claim wherein the wafer (2) of the target (1) and the impact surface (8) are selected from different materials.

6. Method according to the preceding claim wherein the material or materials of the wafer (2) is chosen with a density less than the density of the material or materials of the impact surface (8).

7. Method according to one of the 3 preceding claims wherein the density of the material or materials of the impact surface (8) is chosen greater than 500 kg / m ³ .

8. Method according to one of the 4 preceding claims wherein the density of the material or materials of the wafer (2) is chosen less than 275 kg / m ³ .

9. Method according to one of the five preceding claims in which a target (1) is used comprising a cylindrical target body (12) whose surface of revolution forms the wafer (2) and in which the impact surface (8) comprises, on at least one of the first face (3) and the second face (4), a disk-shaped area.

10. Method according to the preceding claim wherein the diameter of the disk-shaped region is chosen to be smaller than the diameter of the target body (12).

1 1. Method according to one of the two preceding claims, in which a target (1) is used, the body (12) of which is made of polymeric foam and in which at least part of the impact surface (8) is made by crosslinking said foam.

12. Method according to one of claims 9 to 10 wherein is formed at least a portion of the impact surface (8) by attaching a coating (10) on the target body (12).

13. Method according to the preceding claim wherein the fixing is carried out with at least one fastener (1 1) located on a face of the coating (10) opposite the face of the coating (10) forming at least partly the surface of impact (8), and with at least one complementary fastening member (13) formed on the target body (12).

14. Method according to one of the two preceding claims wherein the coating (10) is selected in the form of a plate of polymeric material.

15. Method according to one of claims 4 to 8 wherein a target (1) comprising a belt including a portion of periphery forms the wafer (2) of the target (1) and surrounding a heart (15) target and wherein the outer wall of the target core (15) at least partially forms the impact surface (8).

16. Method according to the preceding claim wherein the heart (15) target is chosen such that it comprises a fastening portion of a zone of the belt (14) opposite the perimeter portion.

17. Method according to one of the two preceding claims wherein the core (15) target is chosen such that it comprises a central core (16) chosen with a thickness less than that of the fixing portion.

18. The method as claimed in one of the preceding claims, in which the Young's modulus of the material or materials of the wafer (2) is chosen to be smaller than that of the material or materials of the impact surface (8).

19. Method according to one of the preceding claims wherein the Young's modulus of the material or materials of the wafer is chosen less than 0.1 giga Pascal.

20. Method according to one of claims 12 or 13 wherein the coating is chosen in the form of a sheet of elastomeric material.

21. Method according to one of claims 1 to 19 wherein the Young's modulus of the material or materials of the impact surface (8) is chosen greater than 0.8 giga Pascal.

22. Method according to one of the preceding claims wherein the marker of the projectile is selected from a liquid dye and a powder.

23. Method according to one of the preceding claims wherein the shell of the projectile is made in the form of a rigid shell of polymeric material or in the form of a flexible shell, preferably gelatin.

24. Method according to one of the preceding claims wherein the shell is formed as a smooth spherical envelope.

25. System for the practice of shooting, comprising a launching machine (19) of a target (1) and a projectile for impacting the target (1), characterized in that the projectile comprises a shell defining a volume interior containing a marker material and thereby the impact of the projectile on the target (1) is configured to cause the rupture of the shell, so as to release the marker material.

26. System according to the preceding claim configured to implement the method according to one of claims 1 to 24.