Topic Creep: Found this 9mm Luger ammo vs 9mm

[Kyrie]

Originally Posted by DonVoigt

This an instance when use of the "European" descriptor makes good sense;
9 x 25
9x23
9x21
9x19
9x18
9x17
etc, with the addition of rimless, or semi-rimmed, or rimmed.
9MM Japanese is a rimmed or "flanged" cartridge.

And since the ubiquitous .38 special is actually a 9mm along with the .357 magnum- the list can go on, and on!

This is actually an interesting thread creep on the thread creep.

If we move away from the criteria of "has 9 mm in the cartridge name" to "is a cartridge with a 9 mm diameter bullet" the lists change.

Assuming, for the sake of the thread, that the 9 mm Luger bullet is our baseline then a 9 mm bullet would have a true bullet diameter of .355 inch (+/- .001 inch).

That definition would exclude the .38 Special (and the .357 Magnum derivative) since the .38 Special bullet is .357 (+/- .001). It would also exclude the 9x18 Makarov, as that bullet is actually 9.3 mm (.363 inch).

OTOH, it would let us add the .38 ACP (and the .38 Super derivative) as the .38 ACP actually uses a bullet of .355 (+/- .001). We could also add the .357 Sig, as it also uses a .355 bullet.