Distinguishing Between 9 mm and 7.65 mm Parabellum on the Fly

[Kyrie]

Originally Posted by ithacaartist

Originally Posted by Kyrie View Post
C) I'd rather be handling a live round that cannot be chambered and fired in the firearm I've examining.


If the pistol turns out to be .30 Luger, wouldn't that be the case after all?

I'm not sure I understand the question. A round of .32 ACP (7.65 mm Browning) dropped into a .30 Luger (7.65 mm Parabellum) chamber would rattle around like a BB in a boxcar. The only dimension the two cartridges have in common is the bullet diameter of .309 (or .308 if one is buying US produced ammo).