Odd Cartridge from Des Moines Ordnance 50 cal. 1943

Something rattles back and forth when I shake it…seems to be 2 pieces. Any ideas ?

Maybe it was an improperly drawn and formed cartridge?

some sort of gauge?

Sorry Guys…a young Warrior came in to the Store…we have Savanna Surplus…I asked him…he started twisting on it and opened the top :)…Well made. The spring and screw that holds the flint in were rattling around in it.

Thanks for the helpIMG_3121