MXPA02006747A - Round of rifle ammunition and method for making same. - Google Patents

Abstract

A round of gun ammunition (12) including a projectile (40) adapted to be propelled from the gun at a subsonic velocity. The round includes a case (14) containing a quantity of gun powder (38) therein, but not filling the case. A projectile (40) projects into the body portion (20) of a case (14) to a location proximate the gun powder. A disc (50) having a circumference substantially matching the inner circumference of the body portion (20) of the case at the level (52) of the gun powder within the case is interposed between the gun powder and the proximal end (56) of the projectile (40) within the case to provide a barrier against movement of gun powder toward the open end (18) of the case (14). In one embodiment, a further disc (80) is interposed between the disc (50) and the proximal end (56) of the projectile (40) to filter out gun powder particles which may escape past the barrier disc (50). A method for the manufacture of the round of gun ammunition is disclosed.

Description

COMPLETE CARTRIDGE OF RIFLE AMMUNITION AND METHOD TO PRODUCE THEMSELVES BACKGROUND OF THE INVENTION This invention describes rifle ammunition of caliber 50 or less, particularly ammunition for rifles and where the projectile is propelled from the barrel of the rifle at a subsonic speed, and the methods for the manufacture of rifle ammunition. In certain shooting situations, it is desirable that the projectile fired from a rifle travel at a speed lower than the supersonic speed. This shooting situation commonly occurs in the course of military execution activities and the law, such as a sniper in shooting action or other activity where it is desired that the location of the trigger is not detected because of the sound associated with the firing of the trigger. rifle and the trajectory of the projectile trip. The ammunition of the rifle that until now has tried to provide a subsonic speed of the projectile of these, in the shot of the ammunition, commonly has been made simply reducing the amount of loaded gunpowder in the cap of each complete cartridge of the ammunition. This procedure leaves a substantially empty portion of the inner volume of the powder cap and / or projectile. The gunpowder in the cap, therefore, flows freely on one or the other end of the cap, depending on whether the rifle used is pointed upwards from the horizontal or below the horizontal. When gunpowder travels to the front end of the bushing (adjacent to the projectile and away from the primer at the closed end of the bushing), the flame generated in the hammer strikes the fulminating that must pass through an empty space between the primer and the gunpowder . This situation creates at least two undesirable factors, namely: (a) the delay of the ignition of the gunpowder and / or (b) a low exposure of the gunpowder to the configuration of the flame. The first of these factors can be so serious that it causes the shooter to believe that he has experienced a missed shot, or causes the shooter to divert his sight from the target. The second of these factors can result in insufficient ignition of the gunpowder and a configuration of the flame that causes an inconsistent propulsion of the projectile from the rifle, thereby causing the shooter's inability to hit a desired target. When the powder moves to the closed end that contains the fulminating cap, in general these factors are reversed, causing a supersonic velocity of the projectile and other harmful results. When the ammunition is fired from an operated rifle in either an automatic or semi-automatic firing mode, and when the bolt of the rifle is operated with gas, the gases are generated by the combustion of gunpowder within the ferrule, the consistent operation Successful bolt action is dependent on maintaining a minimum gas pressure inside the barrel of the rifle, behind the projectile as it moves along the barrel and past the gas gas outlet guiding it from the barrel to the mechanism for activating the bolt. A failure to develop and maintain this minimum gas pressure results in a failure to operate the bolt. The known prior art rifle ammunition which is represented as being capable of firing a projectile at a subsonic speed, is known for its inability to consistently develop the minimum gas pressure required for the operation of the bolt, whereby it is not normally Suitable for use on rifles that have gas operated locks. It is therefore an object of the present invention to provide a complete cartridge of rifle ammunition that consistently drives (cartridge to cartridge) the projectile from the rifle at a speed less than the supersonic speed. It is another objective to provide a complete "subsonic" cartridge of rifle ammunition which, when fired on a rifle that has a gas operated bolt, operates consistently (from cartridge to cartridge) successfully the bolt of the rifle. It is another object to provide a complete cartridge of ammunition suitable for firing from a rifle having a gas operated bolt where the cartridge projectile is driven from the rifle at subsonic speed and where the gas pressure developed inside the rifle barrel and the mechanism for activating the bolt consistently execute the actuation of the cartridge-to-cartridge lock of the ammunition.

It is another object to provide a method for manufacturing a rifle ammunition cartridge suitable for use in a rifle having a gas operated bolt and where the rifle is operated in an automatic or semi-automatic mode and the cartridge projectile leaves the barrel of the rifle at subsonic speed. Other objects and advantages of the present invention will be recognized from the present specification, including the claims and the drawings appended thereto.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a representation, piece by section, of a complete cartridge of rifle ammunition incorporating several aspects of the present invention; Figure 2 is a representation, piece by section, of another embodiment of the complete rifle ammunition cartridge depicted in Figure 1. Figure 3 is a schematic view of several of the components of a complete ammunition cartridge according to an aspect of the present invention. Figure 4 is a representation of a portion of the exit end of a further embodiment of a projectile having a structure alternative to positionally stabilize gunpowder within the shell of an ammunition cartridge. Figure 5 is a still further embodiment of a projectile having an alternative structure for positionally stabilizing gunpowder within the shell of an ammunition cartridge. Figure 6 is a side view of a cotton fiber disc that is also shown as a component of Figure 3; and Figure 7 is a side view of a paper disc which is also represented as a component of Figure 3.

BRIEF DESCRIPTION OF THE INVENTION According to one aspect of the present invention there is provided a complete cartridge of rifle ammunition, particularly for use in rifles having a gas operated bolt and which are capable of firing in automatic or semi-automatic mode. The ammunition of the present invention is structured to propel the projectile from a cartridge of the ammunition of the rifle at a speed lower than the supersonic speed, consistently from cartridge to cartridge of the ammunition. In addition, each ammunition cartridge, when fired, develops and maintains within the rifle, less than the minimum gas pressure which operates consistently from Successfully the rifle bolt when the rifle is fired in automatic or semi-automatic mode. According to one aspect of the present invention, the gunpowder is deployed and stabilized positionally within the end of the shell of each ammunition cartridge adjacent to the fulminator, regardless of the positional position of the rifle at the time of firing. Furthermore, positionally stabilized gunpowder is substantially free of empty spaces which can introduce random deviations in the ignition, in the combustion ratio, etc. of gunpowder sufficient to adversely affect the velocity of the projectile fired from the rifle or increase and maintain a sufficient gas pressure for the consistent, successful operation of the bolt operated with rifle gas. Another aspect of the invention describes the ability to use a pointed projectile with its improved flight characteristics, whereby the delivery of the projectile to a target is exact, when firing at a subsonic speed. This tip-ended projectile also develops less surface friction, which develops less heat, as it travels through the barrel of the rifle, reducing the increase in heat in the barrel during sustained firing cycles. projectile finished in tip produces less wear and incrustation of the internal perforation of the barrel. It has been found that the ammunition of the present invention is suitable when It is fired on a standard military M16M4 rifle (5.56 mm) that has a barrel with a length of 14.5 inches of seven steps.

DETAILED DESCRIPTION OF THE INVENTION In FIG. 1, one embodiment of a complete rifle ammunition cartridge 12 according to the present invention is shown and includes a standard bushing 14 having an output end 16, an open front end 18, and a body 20 including a tubular portion 22, generally hollow which joins with transition curve in the recessed tubular portion 24. The outlet end of the bushing is substantially closed and includes a plug 26 of the igniter inside which a fulminating device 28 is placed. The fulminating tap is accessible from the outside of the bushing and includes a socket 30 of the flame which carries it from the same. and inside the inner volume 32 of the bushing. Notably, the tap 30 of the flame comprises a straight, through-hole having an inward terminal hole 32, whose edge 34 is defined by the junction of the straight wall of the through hole with the wall 36 of the inner bottom of the socket which is normally oriented from the wall of the through hole. By these means, the edge 34 is exactly defined so that the flame generated by the firing of the fulminating agent, leaves the flame intake in a substantially collimated flame that projects itself on the adjacent powder charge 38 for ignition of the powder charge inside the same and along the axial length of the powder charge. When the powder charge j is placed adjacent to the fulminator and the outlet end of the ferrule, in this way the powder charge burns uniformly and substantially radially outward from its axial center line, creating a uniform and consistently sustained combustion. of gunpowder, resulting in a uniform and consistently sustained increase in gas pressure within the barrel of the rifle sufficient for the operation of the bolt operated with rifle gas. As noted, the charge of gunpowder 38 is placed within the bushing adjacent the outlet end of the bushing at a level 52 located within the body portion of the bushing. According to one aspect of the present invention, this gunpowder charge occupies materially less than the inner volume of the cap, in a mode only about 50% of the inner volume of the cap. This volume of slow-burning gunpowder ensures that there will be sufficient accumulated gas pressure to drive a projectile 40, placed in and near the front end of the shell, from a rifle at a subsonic speed while simultaneously generating and maintaining the pressure of the gun. minimum gas inside the rifle when operating the rifle bolt. The selection of the particular gunpowder to be used in a complete cartridge of a given caliber of ammunition, the volume of gunpowder selected, its rate of combustion, etc. until now it has been thought by those with the experience in the art, that it is required of relative small charges of a powder of rapid combustion, such as a gunpowder. On the contrary, the present inventor employs a gunpowder that is classified in the industry as a very slow burning gunpowder. As can be seen, regardless of the type of gunpowder currently used, the present invention addresses the problem of maintaining the powder charge positionally stable inside the ferrule and adjacent to the outlet end of the ferrule, preferably with few or no empty spaces within the volume of gunpowder. For this purpose, the present inventor has found that a powder charge that does not completely fill the interior volume of the bushing can be maintained as a coherent charge within the bushing and adjacent to the outlet end of the bushing, therefore adjacent to the fulminator, by means of a disk 50 that is inserted through the open end of the bushing close to level 52 of the gunpowder in the bushing. The disk is self-supporting and is of a circumference that substantially equals the internal circumference of the bushing at the location of the upper surface 52 of the powder charge maintained in the bushing. The disk 50 is superimposed on the upper surface of the gunpowder within the bushing and preferably has its circumference in frictional engagement with the inner wall of the bushing. After, the proximal end 56 of the extended projectile 40 is inserted into the bushing through the open front end of the bushing. In the embodiment shown, the end 56 adjacent to the projectile is planar and defines a flat surface 58 that is oriented substantially normal to the length dimension of the projectile. In a preferred embodiment, this proximal end, plane of the projectile extends to a location which is contiguous to and preferably in contact, but without pressing against the upper surface 60 of the disk or is arranged separately apart from the upper surface of the disk by a short distance, OJ inches for example, but no further from the disk, than a distance greater than about half the diameter of the disk. The disk 50, which is of a diameter greater than the internal diameter of the recessed portion of the bushing, must be flexible enough to allow the disk to bend to the extent necessary for it to pass through the recessed portion of the bushing, and resilient enough to substantially recover its flat disk geometry once it is within the body portion of the bushing. A disc suitable for use in the present invention comprises a die cut disk of a common "target sample" paper used in the manufacture of rifle targets. The "100-yard target sample" purchased by Hohen Sales of Wright City, MO. It has been found that it is an adequate paper. This paper is about 0.014 inches thick and has a lower basis weight than a sample of a postcard, for example. The disc can be cut with a die from a sheet of paper. Die cutting of the disc results in the compression of the thickness of the paper around the circumferential margin of the cut disc, to a thickness of about 0.010 inches, whereby the disc is reinforced within that circumferential margin. It has been found that this reinforcement is useful in the ability of the disk to resist the deformation thereof which can lead to escape the powder particles of the powder charge and the portion of the inner volume of the sleeve that is on the side of the front end of the disk when the disk is disposed within the bush in engagement with the upper surface of the powder charge. It is contemplated that another paper sample may be employed, as well as other construction materials for the disk. In any case, it is important that the disc quickly disintegrates in the presence of the combustion of the powder charge so that no portion of unburned material passes from the disc, into the gas transfer system employed in conjunction with the operation of the rifle bolt. The complete ammunition cartridge shown in Figure 1 includes a projectile 40 preferably formed of a core 62 of a compacted mixture of a heavy metal powder, such as tungsten powder, and a lighter metal powder, such as powder tin, locked inside a copper 66 jacket. Alternatively, the projectile can be of any of the commonly known metals, metal powders, metal alloys, and the like that are used in the manufacture of projectiles for rifle ammunition. In the complete ammunition cartridge shown in Figure 1, the length of the projectile is such that it provides at least one end 68 remote from the projectile to project out the front end 18 of the shell, and to the near, flat face 51 of the end 56. contiguous of the projectile to project inwards into the inner volume of the shell. As shown, preferably, the proximal end 56 of the projectile extends to a location within the bushing, thereby wherein the proximal face 51 of the projectile is disposed immediately adjacent the surface 53 remote from the disk 50, which in turn is in an overlap coupling with the upper surface 52 of the powder charge 38. This positional relation of the flat face of the projectile with the disk and the powder charge, serves to contain the powder charge within its desired position within the bushing and adjacent to the fulminating end of the bushing, without empty spaces of material inside the bushing. powder charge. In this way, the powder charge does not alter its position inside the cap, without considering the orientation of the barrel from which the cartridge is fired. The ability to use a projectile longer than normal inside a cartridge shell of a given caliber of ammunition provides the ability to use projectiles heavier than normal. This ability to employ a heavy projectile, together with a "reduced" volume of slow-burning gunpowder, for a given caliber ammunition cartridge allows for the increase and maintenance of the required gas pressure within the rifle that is necessary for operate the rifle bolt, particularly when firing in automatic or semi-automatic mode. Of course, a single shot of an automatic or semiautomatic rifle is also possible and the ammunition of the present invention will also operate the gas operated bolt of the rifle during a single shot. In the prior art, it was taught that if one wished to make a complete cartridge of ammunition for a rifle of a given caliber, where the projectile of the complete cartridge is driven from the rifle at a speed less than the supersonic speed, the reduction of the volume of gunpowder, and the use of gunpowder of fast combustion, served for this purpose, keeping all the other components of the complete cartridge without changes of the supersonic version of the cartridge given caliber. In addition to the problems set forth above in relation to the movement of gunpowder within the cap as a function of the position of the rifle at the time of firing (directed up or down or with the horizontal), the prior art efforts have failed to provide a consistent increase in the gas pressure required within the rifle for the operation of the gas operated bolt. This problem in the prior art leads to the conventional wisdom that subsonic ammunition requires a fast-burning powder. The present inventor has found that the ammunition cartridge provided by the present invention can operate with slow-burning gunpowder. A suitable gunpowder is Hodgdon H50BMG. The relatively high density (such as tungsten gunpowder) of the projectile employed by the present inventor offers initial resistance, and / or friction and drag within the barrel of the rifle that the present inventor has found that a slow-burning gunpowder can be employed. without causing the slow-burning gunpowder to propel the projectile from the barrel of the rifle at a supersonic speed. This combination also works to increase the desired gas pressure inside the rifle barrel, to operate in a consistent manner the bolt of the rifle, even without propelling the projectile of the barrel at a supersonic speed.

In a specific example, the 5.56 mm ammunition cartridges are manufactured using a commercial cap for this caliber ammunition. Twelve Hodgdon H50BMG gunpowder grains are loaded into the cap which has been adjusted with a commercial primer. A disk cut with a "target sample" paper die 0.014 inches thick is inserted into the bushing and superimposed on the exposed upper surface of the powder charge. The disk is compressed around its circumferential margins at 0.010 inches thick. A 150-grain powder-based projectile, 1.24 inches in length, is inserted into the socket to a depth such that the total length of the cartridge (from the tip of the projectile end to the bottom end of the shell) is no greater than 2,260 inches, this length is the standard length of a 5.56 mm ammunition cartridge which is meant to be fed to a magazine in the fire chamber of a rifle that accepts this ammunition. In one embodiment, once the projectile has been placed within the bushing, the recessed portion of the bushing is crimped, i.e. having grooves for retaining the projectile in the bushing before firing. In this mode, the proximal, flat face of the projectile is placed within less than EIGHT inches from the top surface of the disk. These cartridges were fired from a standard M16M4 military rifle that has a barrel length of 14.5 inches and a step of 1 in 7. Five shot firing patterns provide a standard deviation in projectile velocity of less than 15 fps with a cartridge that does not produce a supersonic shot. In fact, the firing of five hundred cartridges of the present ammunition do not result in a single supersonic path. These cartridges also operate the rifle's gas operated lock in the automatic and semiautomatic modes. In addition, the accuracy with which these cartridges hit a target placed at 100 yards is surprisingly better than anticipated. For example, 5 firing patterns consistently result in 2.5-inch groupings with an extreme extension no more than 4 inches in 100 yards. In an alternative embodiment, the projectile employed in the present invention may end up on tip as the diameter of the projectile from the warhead to the flat end of the projectile is increased. In a modality, the section ending in tip or bottom, along the length of the projectile, in a 5.56 mm cartridge varies between a diameter of 0.22420 and 0.22430 inches at the proximal end of the projectile to a diameter of 0.22390 and 0.22400 at the location of the transition of the body portion of the bushing into the recessed portion of the bushing. Preferably, this pointed projectile is provided with at least one slot 70 within the portion of the length of the projectile which resides within the recessed portion of the shell. The indentations of the slot in one mode can be 0.040 inches deep. The frictional engagement between the radially bulging inward edge of the groove depression provides sufficient friction to keep the projectile suspended within the ferrule without interfering with the performance of the ammunition cartridge when it is fired.

With reference to Figure 2, in a further alternative embodiment, the inventor has found that the addition of an additional disk 80 interposed between the disk 50 and the flat proximal end of the projectile increases the stability of the position of the disk 50 and provides a protection improved against the escape of gunpowder particles between the circumferential edge 82 of the disc 50 and the inner wall 84 of the ferrule. This additional disc may be a second paper disc, but preferably comprises a disc of non-woven cotton fibers, such as cotton attached loosely found in the Cotton Spins sold by Sentinel Consumer Products, Mentor, OH as item 2834, for articles cosmetics and the care of babies. This additional disk includes a multiplicity of tortuous trajectories through its thickness and therefore functions as a filter for the capture of gunpowder particles that can escape past disk 50. As is true with the paper disk, it is more It is desirable that the fiber material comprises the paper disc or combustion cotton very fast and with a minimum of ash residue. It is now understood that the weight of the cotton fibers for the production of the cotton disc preferably varies between OJO and 0J 6 grains, but the heavier cotton disc weights have been used successfully. In a further alternative embodiment, (see Figure 4) the projectile of the present ammunition cartridge may include an outlet end with recessed frustum section 90 as depicted in Figure 4 and further includes a fast-burning, cell-shaped, cellulosic material. the form of a common liquid drinking straw 92 having one of its ends frictionally engaging the frustoconical section 90 of the projectile to extend therefrom and causing its opposite end to engage, or be in close proximity to, a disk ( or a plurality of disks) arranged in an overlap relationship with the upper surface of the gunpowder charge. By these means, the exit end of the projectile can be separated a considerable distance away from the disk (s) while the "straw" serves to assist in the retention of the disk in its position of overlap in relation to the powder charge. of cannon. If desired, the recessed frustoconical section shown in Figure 4 can be omitted and only the "straw" is used to couple the disk (s) as depicted in Figure 6. It will be apparent to one skilled in the art. technique that other forms of a spacer may be employed to establish and maintain a desired spacing between the projectile end and the disk (s). Whereas the present invention has been described in terms and specific examples, a person skilled in the art will recognize other alternatives. For example, while each of the discs 50 and 80 has been described as having parallel, flat, opposite sides, it will be recognized that one or more of the sides of the discs may be concave or convex suitably as the case may be.

Claims (1)

1. NOVELTY OF THE INVENTION CLAIMS 1- A cannon ammunition cartridge including a projectile adapted to be driven from a barrel along a trajectory to a target, at a subsonic speed, said cartridge being characterized in that it comprises: a) a funnel-shaped cap generally extended, having a body portion, a partially closed outlet end housing a fulminator, and a recessed portion adjacent to an open front end thereof, b) an amount of gunpowder disposed within and incompletely filling the body portion of the bushing, c) an extended projectile having opposite, distant and proximal ends residing in the recessed portion of the bushing with the distal end thereof projecting from the front end of the bushing and with the proximal end thereof extending into the bushing, the proximal end of the projectile including a generally flat face disposed substantially perpendicularly icular to the length of the extended projectile, the proximal end of the projectile ending within the body portion of the cap with its face arranged adjacent to the amount of powder, d) a disc formed of readily flammable material, having a first and second faces generally parallel and opposite and which are of a circumference essentially equal to the inner circumference of the portion of body of the cap at the location of the gunpowder quantity level, disposed within the cap between the amount of gunpowder and the face of the proximal end of the projectile, the disc defining a barrier against the flow of gunpowder from the disc. 2. The cannon ammunition cartridge according to claim 1, further characterized in that it includes an additional disk, having opposite and distant facing faces, disposed within the body portion of the shell and between the disc and the adjacent face of the shell. proximal end of the projectile, the adidonal disc which is made of fibrous material has a plurality of tortuous passages defined through the thickness thereof which serve to filter and capture within the disc, the individual particles of gunpowder that can escape passing the barrier defined by the disk. 3. The cannon ammunition cartridge according to claim 1, further characterized in that the disk is resiliently flexible. 4. The cannon ammunition cartridge according to claim 1, further characterized in that the disk comprises a paper sample. 5. The cannon ammunition cartridge according to claim 4, further characterized in that the disk is of a first thickness in the center thereof and of a second and smaller thickness in the circumferential margin thereof. 6. - The cannon ammunition cartridge according to claim 5, further characterized in that the first thickness in the center of the disk is about 0J4 inches and the second and smaller thickness in the circumferential margin thereof is about EIGHT inches from thickness. 7. The cannon ammunition cartridge according to claim 3, further characterized in that the additional disk comprises natural nonwoven fibers. "-> 8. The cannon ammunition cartridge according to claim 7, further characterized in that the weight of the disk is between 0 or close to OJ 0 and close to OJ 6 grains. The barrel according to claim 2, furthermore characterized in that the distal face of the additional disc is placed next to the disc and the proximal face of the additional disc is close to the adjoining face of the proximal end of the projectile disposed therein. 15 of the body portion of the cap. 10. The cannon ammunition cartridge according to claim 1, also being caraderized because the gunpowder powder is of fast combustion. 11.- The cannon ammunition cartridge in accordance with the 20 claim 1, further characterized in that the projectile includes an intermediate body portion at its distant and proximal ends, the distal end of the projectile defines a warhead, and the projectile terminated from a first and minimum diameter at its end close to a second and more diameter adjacent to the transition of the projectile body portion to the projectile warhead. 12. The cannon ammunition cartridge according to claim 11, further characterized in that the difference between the first and second diameters of the projectile ending in tip is about 0.00030 inches. 13. The cannon ammunition cartridge according to claim 12, further characterized in that the cartridge is suitable for firing from a 5.56 mm caliber gun. 14. The cannon ammunition cartridge according to claim 1, further characterized in that it includes a separator interposed between the disk and the face proximate to the adjacent end of the projectile. 15. A method for manufacturing cannon ammunition that includes a projectile adapted to be driven from a barrel along a trajectory to a target at a subsonic speed, said method characterized in that it comprises the steps of (a) loading a cannon ammunition cap having an open end with a quantity of gunpowder powder at a lower level of the volumetric capacity of the cap, (b) inserting an extended projectile having opposite, distant and proximal ends into the open end of the cap the distant end of the projectedil projects from the open end of the bushing and the proximal end of the projectile projecting into the bushing and ending adjacent to the gunpowder disposed within the bushing, (c) placing a disk within of the cap and intermediate of the gunpowder and the proximal end of the projectile, the disc has a circumference approximately equal to the inner diameter of the cap at the location of the level of gunpowder within the cap and which functions as a barrier against movement of the gunpowder that passes from there. 16. The method according to claim 15, further characterized in that it includes the step of interposing an additional disk into the intermediate bushing of the disk and the proximal end of the projectile, the additional disk is of material different from the disk material. 17. The method according to claim 16, further characterized in that the disk is resiliently flexible. 18. The method according to claim 16, further characterized in that the disc comprises wet deposited cellulosic fibers. 19. The method according to claim 18, further characterized in that the disk comprises paper. 20. The method according to claim 16, further characterized in that the disk is of a first thickness in general in the center thereof and of a second and smaller thickness in the circumferential margin thereof, the circumferential margin is of a density greater than the density of the disk in general at the center of it. 21. - The method according to claim 16, further characterized in that the additional disk comprises natural fibers deposited with air. 22. The method according to claim 21, further characterized in that the natural fibers comprise cotton fibers. 23. The method according to claim 16, further characterized in that the bushing includes a substantially closed end adapted to receive a fulminator, an opposite, open end, and an intermediate body portion of the open and closed ends of the bushing, the bushing includes an intermediate recessed portion of the body portion and the open end including the additional steps of placing a portion of the projectile between the opposite ends within the recessed portion of the shell, and anchoring the projectile within the recessed portion against movement in relation to the recessed portion. 24. The method according to claim 16, further characterized in that it includes the step of interposing a separator between the disk and the proximal face of the adjacent end of the projectile within the bushing.