WWI USGI pistol ammo?
I am looking to buy some WWI USGI .45 acp ammunition to put in a display case with an O1918 Colt.
I see plenty of Frankfort Arsenal stuff on the auction sites, but it's usually in enormous lots. There's another listing for Remington 1918-dated ammo, though. How can I tell if it's USGI or commercial stuff?