CARTRIDGE FOR SMALL ARMS Russian patent published in 2007 - IPC F42B5/00 F42B5/26 

FIELD: ammunition.

SUBSTANCE: the cartridge has a cartridge case with a body, base and a neck, powder charge, primer cap and a bullet. A recess or a flat, whose width makes up 0.2 to 0.5 of the caliber, is made on the external surface of the cartridge case body at a distance of 1.2 to 1.3 of the caliber from the cartridge case end face towards the neck from the section formed by the joint of the radius part of the inner cavity of the cartridge case base with the inner surface of the cartridge case body.

EFFECT: prevented wedging-out of the cartridge case in the small arms chamber and enhanced reliability of unobstructed extraction of the cartridge case from the chamber.

2 dwg