FI101249B - Bullet and method of making it - Google Patents

Description

101249

Bullet and method of making it

The invention relates to a bullet for use in firearms and to a method for manufacturing bullets for use in firearms.

The barrel of a firearm must be cleaned at regular intervals to remove remnants of bullets and combustion debris such as soot, gunpowder and burnt grease that have accumulated in the barrel. Bullet remnants in this context refer to metal residues from the bullet 10 in the barrel, in particular copper residues.

The barrel is usually cleaned mechanically, i.e. the barrel is rubbed with a hard faucet, such as a bronze brush. Mechanical abrasion is a laborious and slow operation. In addition, it consumes the surface of the barrel, shortening the life of the gun.

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Various cleaning agents have been developed for cleaning, but mechanical cleaning is still required in connection with their use. In addition, cleaning agents are relatively expensive.

It is an object of the present invention to obviate the above drawbacks. In particular, it is an object of the invention to provide a novel, less barrel-dirty bullet.

It is a further object of the invention to provide a novel method of making bullets which save the barrel of a weapon, i. which contaminate the barrel of the weapon even less and which can be used to reduce the number of cleaning times of the barrel and thus significantly extend the service life of the barrel *.

For aspects of the invention, reference is made to the claims.

The invention provides a bullet for use in a firearm having a surface composed of a carbide compound. According to the invention, a surface consisting of 2,102,249 carbide compounds was created in such a way that, in use, less cleaning-requiring residues are released from the surface of the bullet into the barrel of the weapon.

In the studies leading to the invention, it was found that the copper carbide coating formed on the surface of the copper-coated bullets 5 has advantageous effects for the use of the bullet. In use, the copper carbide coating significantly prevents copper debris from adhering to the barrel of the weapon. In addition, a copper-carbide coating formed on the surface of the bullet has been found to have a positive effect on the bullet exit velocity from the barrel of the weapon.

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By carbide compound is meant in this context any carbide compound which achieves the above-mentioned advantageous effects. The method of forming the surface is not limited in any way, e.g., the bullet shell may consist of such a carbide compound or, most preferably, the bullet may be partially or completely coated with the carbide compound. The carbide surface can be formed by any method per se known in the art, as is known in chemistry. The layer thickness of the coating is not limited and can vary, for example, from the order of magnitude of the molecular layer to the order of milliseconds or 10 times its size. Further, the carbide compound coating need not consist of a pure carbide compound, but may optionally contain other compounds, e.g., as enhancing ingredients or impurities.

Preferably, a coating of copper carbide (CuC = CCu) is formed on the surface of the bullet. According to a preferred embodiment of the invention, the copper-clad bullet is treated with acetylene to form a copper carbide layer on the copper-25 surface. The treatment can be carried out by contacting a copper bullet with acetylene gas to form a carbide on the surface of the copper. The advantage of processing is its simplicity.

The invention will now be described by way of exemplary embodiments, which are intended only to illustrate the invention without limiting it in any way.

Example 1: Method of making bullets 3 101249 A plastic bag containing calcium carbide, loosely wrapped so that gas can escape, was placed in a container, e.g. The container was sealed and the copper bullets were stored in the container at room temperature for 5 days to a few weeks. During storage, the bullets changed to a red color due to acetylene gas released from the calcium carbide decomposing under the container conditions, which reacted with the copper on the surface of the bullets to form Cu carbide.

10 After reaching the desired shade of red, which can range from reddish to dark brown, almost black, the bullets were removed. Cu carbide was detected analytically on the surface of the bullets. After treatment, there may be some impurities on the surface, which darkens the color.

The formation of copper carbide on the surface of the bullet and thus the thickness of the copper carbide layer is naturally affected by the acetylene gas content during treatment, the temperature and the treatment time.

In the example, calcium carbide was used as the acetylene source, which decomposed in the container due to the moisture in the air. It should be noted that copper bullets can be contacted with acetylene or another carbide-forming gas or other compound. Raising the temperature promotes the reaction, e.g., treatment at 40 ° C produces a copper carbide layer faster than the corresponding treatment at room temperature.

In the use test, the firearm used carbide-coated bullets prepared according to the example, as well as otherwise similar non-carbide-coated bullets, caliber 6 mm, starting speed approx. 950 m / s. It was found that by using the bullets according to the invention, the number of cleaning times of the barrel of the weapon could be reduced by less than half compared to the number of cleaning times using uncoated copper bullets according to the prior art. The reduction in the number of cleanings was up to 70-80%.

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When measuring the exit velocity of bullets from the barrel of a weapon, it was found that the exit velocities of carbide-coated bullets, about 990 m / s, were significantly higher than the exit velocities of uncoated, conventional copper bullets.

Claims (5)

1. Bullet, useful in firearms, characterized in that the surface of the bullet consists of a copper carbide compound. Ball according to claim 1, characterized in that the ball is a copper ball that has been treated with acetylene so that a copper carbide coating has been formed on the surface of the copper. 3. A method of making a bullet useful in firearms, characterized in that on the bead, a surface of a copper carbide compound consisting of surface is formed by treating the bead with acetylene gas. 4. A method according to claim 3, characterized in that the treatment of the cuticles is carried out by placing the balls in a sealed space and by admitting acetylene gas from calcium carbide. 5. A process according to claim 4, characterized in that the acetylene gas is released into the space from the calcium carbide by means of the natural humidity of the air.