[Red in Blue PA]

Is the .45 ACP a great caliber for stopping power of men? Absolutely.

Does it outperform smaller calibers such as the 9mm as it once did? No.

Modern ballistics have closed the gap between the 9mm and the 45 ACP. Many modern hollow tip bullets have 50% expansion. This means that a 9mm bullet (.355) actually expands to .5325 caliber, larger than an unexpanded 45 ACP.

Those are the cold, hard facts.

[Rinnwald]

Modern ballistics have closed the gap between the 9mm and the 45 ACP. Many modern hollow tip bullets have 50% expansion. This means that a 9mm bullet (.355) actually expands to .5325 caliber, larger than an unexpanded 45 ACP.

Doesn't that mean the .45 would expand to .675"?

I don't mean to pick a fight with 9mm guys. I like Georg Luger's venerable cartridge too. It's just that modern ballistics have improved all cartridges, not just the 9mm.

[FreedomForce]

I have them both. 9mm or 45ACP suits me just fine. I don’t have a .40 but that’d be fine with me, too. High performance hollowpoints have made arguing over caliber seem pretty silly to me.