Abstract: A method is disclosed for coating a projectile for use in an ammunition cartridge. A polymer jacket is applied to an undersized projectile core of a first standard caliber to bring the outer dimensions of the jacketed projectile into compliance with those of a second, larger caliber projectile. The polymer jacket coating may produce a non-uniform outer diameter of the polymer jacketed projectile and may include a plurality of circular cavities defined therein. The polymer-jacketed projectile may be a bullet for pistol or rifle ammunition, or a pellet, or shot for use in a shotgun shell.

Abstract: The present invention provides a two piece and a three piece primer insert for ammunition piece. Each of the individual pieces may be formed by punching, pressing, stamping, molding, milling, coining, or by additive manufacturing. The individual pieces may be joined by clinching, pressing welding soldering, sintering, adhesive gluing, staking, and iterative addition by forming one piece into another piece.

Abstract: A projectile for use in a firearm ammunition cartridge, and a method of forming the projectile the projectile including a core, a jacket in which the core is disposed, the jacket having a closed rearward end and an open forward end, the forward end tapering inwardly toward a longitudinal centerline of the jacket to define an ogive portion of the projectile, and extending past a forward end of the core to form an open space inside the jacket between the forward end of the core and the forward end of the jacket, and a plurality of ventilation ports formed proximate the forward end of the jacket, each of the ventilation ports having a first opening on an inner surface of the jacket defining the open space, and a second opening on an outer surface of the jacket.

Abstract: A powder compaction device is disclosed. The device has a drive motor operable connected to a compaction rod that moves through a loading platform to a cartridge holding platform. A powder loading station is positioned below the loading platform and above the cartridge holding platform. The compaction rod moves through the powder loading station, which loads a predetermined volume of propellant powder into one or more reliefs defined in the compaction rod. The cartridge holding platform has a removable cartridge fixture designed to receive an ammunition cartridge to be loaded and compacted with propellant powder. The propellant powder is released into the cartridge fixture from the reliefs as the compaction rod passes a funnel defined at an upper end of the fixture. After releasing the powder, the compaction rod continues into an interior chamber of the fixture to compact the powder contained therein.

Abstract: The present invention provides three piece primer insert for use in polymer ammunition comprising: an upper primer insert portion comprising an upper primer insert bottom portion, a substantially cylindrical coupling element extending away from the upper primer insert bottom portion; and an upper flash aperture that extends through the upper primer insert bottom portion, a lower primer insert portion in contact with the upper primer insert portion, wherein the lower primer insert portion comprises a lower primer insert top portion positioned adjacent to the upper primer insert bottom portion at a connection joint, a lower flash aperture positioned in the lower primer insert top portion and aligned with the upper flash aperture, and a primer recess that extends away from the lower primer insert top portion to an extraction flange and in communication with the lower flash aperture; and a connecting portion that secures the upper primer insert portion and the lower primer insert portion wherein the connecting po

Abstract: The present invention provides a diffuser ring adapted to fit a primer recess in an ammunition cartridge comprising: a diffuser ring sized to fit in a primer recess for an ammunition cartridge comprising a diffuser top surface opposite a diffuser bottom surface, a diffuser aperture positioned through the diffuser top surface and the diffuser bottom surface such that the diffuser aperture can align with a flash hole, a diffuser neck positioned about the diffuser aperture to extend away from the diffuser top surface, wherein the diffuser neck is sized to fit at least partially through the flash hole, and a ring connected to the diffuser neck, wherein the ring comprises a ring aperture connected to the diffuser neck to align the ring aperture and the diffuser aperture.

Abstract: A method of forming a projectile for use in a firearm ammunition cartridge, the method including mixing a first material and a second material having different densities to produce a core mixture, disposing the core mixture in a die, heating the core mixture to the melting point, removing the core mixture from the die, quenching the core mixture, and plating the core mixture with a jacket material.

Abstract: The present invention provides a diffuser cup adapted to fit a primer recess in an ammunition cartridge comprising: a diffuser ring sized to fit in a primer recess for an ammunition cartridge comprising a diffuser top surface opposite a diffuser bottom surface, a diffuser aperture positioned through the diffuser top surface and the diffuser bottom surface such that the diffuser aperture can align with a flash hole, a diffuser neck positioned about the diffuser aperture to extend away from the diffuser top surface, wherein the diffuser neck is sized to fit at least partially through the flash hole; a ring connected to the diffuser neck, wherein the ring comprises a ring aperture connected to the diffuser neck to align the ring aperture and the diffuser aperture; and a cup wall attached to the diffuser ring to extend away from the diffuser bottom surface, wherein the cup wall is configured to frictionally fit a primer and frictionally fit a primer recess.

Abstract: The present invention provides a method of making a metal injection molded ammunition cartridge comprising the steps of: providing an ammunition cartridge mold comprising a bottom portion having a primer recess extending into the bottom portion adapted to receive a primer, a flash hole positioned in the primer recess through the bottom surface; side walls extending from the bottom portion to a nose end aperture, wherein a propellant chamber is formed between the nose end aperture and the bottom surface; injecting a metal composition into the ammunition cartridge mold to form a metal injection molded ammunition cartridge; and removing the metal injection molded ammunition cartridge from the ammunition cartridge mold.

Abstract: The present invention provides a primer insert for a polymer ammunition cartridge. The primer insert has a top surface opposite a bottom surface. The top surface has a primer recess defined therein, which is in fluid communication with the propellant chamber of the ammunition cartridge through a flash hole defined through the bottom surface. A groove is defined in the primer recess and surrounds the flash hole. A planar portion of the bottom surface surrounding the flash hole is connected to a vertical coupling element by a transition region. The transition region has a first and second concave portions positioned around a transition protrusion. An extraction flange is formed about the top surface.

Abstract: The present invention provides polymer ammunition, ammunition cartridge, ammunition case, and portions thereof having traditional and non-traditional cartridge shapes or profiles.

Abstract: The present invention provides a method of making a metal injection molded ammunition cartridge comprising the steps of: providing an ammunition cartridge mold comprising a bottom portion having a primer recess extending into the bottom portion adapted to receive a primer, a flash hole positioned in the primer recess through the bottom surface; side walls extending from the bottom portion to a nose end aperture, wherein a propellant chamber is formed between the nose end aperture and the bottom surface; injecting a metal composition into the ammunition cartridge mold to form a metal injection molded ammunition cartridge; and removing the metal injection molded ammunition cartridge from the ammunition cartridge mold.

Abstract: The present invention provides a two piece and a three piece primer insert for ammunition piece. Each of the individual pieces may be formed by punching, pressing, stamping, molding, milling, coining, or by additive manufacturing. The individual pieces may be joined by clinching, pressing welding soldering, sintering, adhesive gluing, staking, and iterative addition by forming one piece into another piece.

Abstract: The present invention provides a subsonic ammunition including a polymeric casing body; a propellant insert positioned in the propellant chamber to reduce the internal volume of the propellant chamber; a propellant disposed and confined within the propellant chamber; a primer insert positioned at the body base and in communication with the propellant chamber; a primer and diffuser disposed in the primer insert in combustible communication with the propellant; and a projectile frictionally fitted in the mouth in combustible communication with the propellant.

Abstract: One embodiment of the present invention provides a polymeric ammunition having a metal injection molded primer insert.

Abstract: A projectile for use in a firearm ammunition cartridge, and a method of forming the projectile the projectile including a core, a jacket in which the core is disposed, the jacket having a closed rearward end and an open forward end, the forward end tapering inwardly toward a longitudinal centerline of the jacket to define an ogive portion of the projectile, and extending past a forward end of the core to form an open space inside the jacket between the forward end of the core and the forward end of the jacket, and a plurality of ventilation ports formed proximate the forward end of the jacket, each of the ventilation ports having a first opening on an inner surface of the jacket defining the open space, and a second opening on an outer surface of the jacket.

Abstract: The present invention provides a chambering device for a barrel of a gun comprising: a shank extending longitudinally between a front end and a rear end and having a plurality of cutting flutes disposed between the front end and the rear end; a shaft extending to the rear end of the shank and adapted to rotate the shank along an interior of the barrel to form a chamber therein, wherein the shank comprises a body region that extends to a shoulder region that transitions to a case mouth that extends to a throat connected to a free bore, wherein the body region comprises a rear diameter near the breech face of about 0.4718; and a body shoulder junction diameter of about 0.4625; wherein the shoulder region comprises a shoulder case mouth junction diameter is between 0.31 to 0.32; a breech face to lead-in bore junction length of between 2.1 to 2.2; a breech face to body-shoulder junction length of between 1.80-1.85; and a breech face to shoulder neck junction length of between 1.9-2.0.

Abstract: The present invention provides a barrel of a firearm, comprising: a barrel bore being defined within said barrel; a cartridge chamber being defined within said barrel from a head face to said barrel bore, said cartridge chamber having a generally tapered internal body wall surface; a cartridge case shoulder support surface; wherein the cartridge case shoulder support surface has a shoulder taper angle of about 30 degrees; and a shoulder transition connecting the cartridge case shoulder support surface to a throat in communication with the barrel bore, wherein the shoulder transition has a radius of circular curve convex segment 138 and a radius of circular curve concave segment 140.

Abstract: The present invention provides a method for chambering a barrel of a gun comprising the steps of: providing a chamber reamer comprising a shank extending longitudinally between a front end and a rear end and having a plurality of cutting flutes disposed between the front end and the rear end; a shaft extending to the rear end of the shank and adapted to rotate the shank along an interior of the barrel to form a chamber therein, wherein the shank comprises a body region that extends to a shoulder region that transitions to a case mouth that extends to a throat connected to a free bore, wherein the body region comprises a rear diameter near the breech face of about 0.4718; and a body shoulder junction diameter of about 0.4625; wherein the shoulder region comprises a shoulder case mouth junction diameter is between 0.31 to 0.32; a breech face to lead-in bore junction length of between 2.1 to 2.2; a breech face to body-shoulder junction length of between 1.80-1.

Abstract: A powder compaction device is disclosed. The device has a drive motor operable connected to a compaction rod that moves through a loading platform to a cartridge holding platform. A powder loading station is positioned below the loading platform and above the cartridge holding platform. The compaction rod moves through the powder loading station, which loads a predetermined volume of propellant powder into one or more reliefs defined in the compaction rod. The cartridge holding platform has a removable cartridge fixture designed to receive an ammunition cartridge to be loaded and compacted with propellant powder. The propellant powder is released into the cartridge fixture from the reliefs as the compaction rod passes a funnel defined at an upper end of the fixture. After releasing the powder, the compaction rod continues into an interior chamber of the fixture to compact the powder contained therein.