Patent ID: 7707942

Claim:
An ammunition cartridge comprising: a tube extending along a central longitudinal axis from an aft end of the tube to a fore end of the tube; a basewad disposed within the tube and located proximate the aft end of the tube, the basewad including: an interior surface extending outward and forward from a generally forward facing inner portion to a generally inward facing fore portion so as to define a skirt of the basewad; a projectile wad disposed within the tube, the projectile wad including: a forward facing surface, and an interior surface extending outward and rearward from a generally aft facing inner portion to a generally inward facing aft portion so as to define a powder cup skirt, the powder cup skirt having: a lip having an end surface, the end surface being substantially uninterrupted around the entire powder cup skirt, and a chamfer formed around an outer perimeter of the lip, which has an outside diameter that permits the lip to be slidably received within the skirt of the basewad so as to form a chamber between the powder cup skirt and the skirt of the basewad; a propellant charge disposed within the chamber; and at least one projectile disposed within the tube between the forward facing surface of the projectile wad and the fore end of the tube.