Quote Originally Posted by Cattle/Horses View Post
There were 2 different types of commercial surplus ammo for these. The pistol and the rifle (PPSH 41 & 43). The rifle was loaded a LOT hotter.
I have shot mostly ppu through mine. I had some romanian surplus which was fine. I shot some polish surplus, that had cracked case necks (apparently they didn't anneal the brass), but it shot fine.