Patent ID: 6352033
Filing Date: 2002-03-05
Classification: B21D,F42B

Abstract:
A rim-fire cartridge, comprising:a cartridge case having a cylindrical wall and a closed base, the cartridge case having a circumferential bulge at the base extending radially outwardly from the cylindrical wall and having an opening into the interior of the cartridge case; a projectile provided on and closing the cartridge case at an end opposite the base; a propellant-charge powder provided inside the cartridge case; and an ignition charge for the propellant-charge powder provided in the circumferential bulge in the cartridge case; wherein the base of the cartridge case has a projecting portion projecting axially inwardly towards the interior of the cartridge case to reduce a size of the opening of the bulge, the projecting portion including at least a portion of the base at a periphery of an internal diameter of the cylindrical wall of the cartridge case.