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An ammunition cartridge has a tube extending along a central longitudinal axis from an aft end to a fore end. The tube has an interior surface and an exterior surface. A metallic head has a sleeve portion secured to the tube along an aft section of the tube and has a centrally-apertured web portion

An ammunition cartridge has a tube extending along a central longitudinal axis from an aft end to a fore end. The tube has an interior surface and an exterior surface. A metallic head has a sleeve portion secured to the tube along an aft section of the tube and has a centrally-apertured web portion spanning the sleeve portion so as to form a base of the cartridge. A basewad is contained within the tube and is separately formed therefrom. The basewad is located proximate the aft end of the tube. The basewad has a generally cylindrical exterior surface engaging the interior surface of the tube, an aft surface contacting the metal head, an interior surface. The interior surface extends from a generally forward-facing inner portion, forward and outward to a generally inward-facing fore portion so as to define a skirt portion of the basewad between the exterior surface and interior surface. At least one projectile is carried within a fore volume of the tube. A propellant charge is located aft of the projectile. Wadding is located between the propellant charge and the projectile. The wadding includes an aft portion located at least partially concentrically within the skirt portion of the basewad so as to define a powder chamber containing the propellant charge.

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[ We claim:] [1.] An ammunition cartridge, comprising:a tube, extending along a central longitudinal axis from an aft end to a fore end and having an interior surface and an exterior surface;a metallic head having: a sleeve portion secured to the tube along an aft section of the tube; and a centrall

[ We claim:] [1.] An ammunition cartridge, comprising:a tube, extending along a central longitudinal axis from an aft end to a fore end and having an interior surface and an exterior surface;a metallic head having: a sleeve portion secured to the tube along an aft section of the tube; and a centrally apertured web portion spanning the sleeve portion and forming a base of the cartridge;a basewad contained within the tube and separately formed therefrom, the basewad located proximate the aft end of the tube and having: a generally cylindrical exterior surface engaging the interior surface of the tube; an aft surface contacting the metallic head; and an interior surface, extending from a generally forward facing inner portion, forward and outward to a generally inward facing fore portion so as to define a skirt portion of the basewad between the exterior surface and interior surface;at least one projectile carried within a fore volume of the tube;a propellant charge aft of the at least one projectile; andwadding between the propellant charge and the at least one projectile, the wadding including an aft portion located at least partially concentrically within the skirt portion of the basewad so as to define a powder chamber containing the propellant charge.