Patent ID: 11933593
Assignee: FEDERAL CARTRIDGE COMPANY
Field: Other special machines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
1. A shotgun shell cartridge comprising:
a casing comprising a primer;
a shot wad positioned in the casing;
a biodegradable fiber powder wad comprising wax evenly distributed through a cellulosic fiber located inside the casing, rearward of the shot wad, the biodegradable fiber powder wad having an annular depression in a rearward-facing axial end and a ring located radially outward from the annular depression;
wherein the wax comprises a first wax and a second wax, the first wax and second wax being comprised of different materials; and
a propellant in the casing rearward of the biodegradable fiber powder wad.