Patent ID: 9341452
Filing Date: 2016-05-17
CPC Classification: F42B

Claim Text:
1. A gun cartridge comprising a tubular first casing formed to provide an elongated tubular first cavity having a proximal firing end section and a distal pellet load end section, said firing end section containing a primer and explosive material, a projectile structure is positioned in said distal load end section and comprises a frangible shatterable tubular second casing of a polymeric material providing an elongated tubular second cavity having a closed distal load end portion, and an open proximal neck end portion, wherein the wall thickness of said load end portion ranges from 1/32 in. to 3/16 in., a momentum (MV) element is mounted in said neck end portion, and a pellet load is contained in said distal load end portion of said second cavity, wherein said MV element comprises a metallic body having a plug portion dimensioned for a close sliding fit into said neck end portion of said second cavity, and further having a circular head portion providing an annular shoulder for distributing firing forces evenly around said tubular second casing, and wherein a plurality of rifling ridges and adjacent grooves are provided on the exterior wall surface of said load end portion of said tubular second casing, which ridges and grooves extend slightly laterally angularly and generally longitudinally of said second casing.