An ammunition cartridge having a cup-shaped casing. The cup-shaped casing has a closed reward end with a rearward diameter and an open forward end having a forward diameter that is larger than the rearward diameter. A sidewall extends between the peripheries of the rearward end and the top end of the casing. The sidewall tapers from the smaller rearward diameter to the larger forward diameter along a length of a hollow interior of the casing that holds a propellant charge.

The present invention is an improved .30 caliber cartridge that overcomes the limitations of the prior art by providing a centerfire cartridge with a case having a head with a rim, a body extending from the head to a tapered shoulder to a mouth that seats a bullet. The cartridge having a dimension that is short enough to fit in an automatic pistol's magazine and when fired from such a pistol's barrel will achieve ballistics closely resembling that of a rifle carbine.

The present invention is an improved .30 caliber cartridge that overcomes the limitations of the prior art by providing a centerfire cartridge with a case having a head with a rim, a body extending from the head to a tapered shoulder to a mouth that seats a bullet. The cartridge having a dimension that is short enough to fit in an automatic pistol's magazine and when fired from such a pistol's barrel will achieve ballistics closely resembling that of a rifle carbine.

The present invention is an improved .30 caliber cartridge that overcomes the limitations of the prior art by providing a centerfire cartridge with a case having a head with a rim, a body extending from the head to a tapered shoulder to a mouth that seats a bullet. The cartridge having a dimension that is short enough to fit in an automatic pistol's magazine and when fired from such a pistol's barrel will achieve ballistics closely resembling that of a rifle carbine.

The present invention is an improved .30 caliber cartridge that overcomes the limitations of the prior art by providing a centerfire cartridge with a case having a head with a rim, a body extending from the head to a tapered shoulder to a mouth that seats a bullet. The cartridge having a dimension that is short enough to fit in an automatic pistol's magazine and when fired from such a pistol's barrel will achieve ballistics closely resembling that of a rifle carbine.

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.

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.

Gun and ammunition solutions which permit the use of High Explosive (HE) rounds and Armor Piercing Fin Stabilized Discarding Sabot (APFSDS) rounds in one weapon. A first system has a gun barrel chamber sized to receive the outer cases of both APFSDS and HE rounds. The chamber has a smooth rear section which abuts a front section having internal helical rifling. A HE round has an outer case with a length that is the same as the length of the smooth rear section of the barrel. A projectile held by the case has a rotating band on a rear end configured to engage the internal helical rifling in the chamber. A second system has a conventional smooth barrel and utilizes a HE round with an outer case having internal rifling in a forward section. A projectile held by the outer case has a circular band mounted to rotate about a rear end thereof to engage the internal rifling.

The present invention discloses a lightweight hybrid cartridge case (100) for a cartridged ammunition and a method of manufacture (200). The lightweight hybrid cartridge case (100) includes a cap (110) with a cylindrical sidewall (112) connected a base (120); a polymer shell (150) is insert-molded onto the sidewall of the cap; and an overmolded sleeve (180) is formed to cover the metal-polymer joint between the cap (110) and the polymer sleeve (150). The cylindrical sidewall (112) covered by the overmolded sleeve (180) has a plurality of stepped ridges (132, 132a), preferably with one stepped ridge (133) having a C-stepped edge (134).

The present invention discloses a lightweight hybrid cartridge case (100) for a cartridged ammunition and a method of manufacture (200). The lightweight hybrid cartridge case (100) includes a cap (110) with a cylindrical sidewall (112) connected a base (120); a polymer shell (150) is insert-molded onto the sidewall of the cap; and an overmolded sleeve (180) is formed to cover the metal-polymer joint between the cap (110) and the polymer sleeve (150). The cylindrical sidewall (112) covered by the overmolded sleeve (180) has a plurality of stepped ridges (132, 132a), preferably with one stepped ridge (133) having a C-stepped edge (134).