Yep.Some of those cases were there when I got there first thing in the morning.
It's that odd shape pistol caliber from Europe IIRC.
It looks like a rifle case but much smaller and has the bludge near the neck of the case.
Ah-ha! Most likely then. The one & only time I shot a PPSh I was absolutely NOT concerned about finding brass, I was to busy making the cases rain down on me. :-Dprobably my 7.62X25...shot from my CZ52 and PPSh 41