
This consists of a primed cartridge case carrying a small propelling charge of 6 grains of black powder. The mouth of the cartridge case fits around a steel slug and the cartridge case is held to the slug by crimping. The steel slug has sharp corners for severing the tie wires.
6 grains of black powder.
Nothing else to see.
TM 9-1904, Ammunition Inspection Guide (1944)