If you don't have carbide dies for straight-wall pistol cases, you MUST lube the cases. And make sure they're clean.
A possible secondary problem is that military brass is thicker than commercial. But I think it's a lube problem.
IIRC, that doesn't impact the outside diameter. Only the inside diameter which, theoretically, raises pressures.
To the OP: do yourself a favor and invest in carbide resizing dies.