Originally Posted by Amplified
Is the .40 S&W really all that much more effective than the 9mm? .45 ACP penetration is awfully pathetic, but it's still a good anti-personal caliber. Out of these three calibers, which would be the best one overall?
They're all on equal footing. The advantage of the 9mm is cost, capacity and thickness of the grip. The 45 is already expanded. It will leave a mark. The 40 is a good combination of capacity and size.
I have all three and I carry all three (not at one time). No problem having to depend upon versus another. Ballistics vary upon which length barrel you're talking about and what type of load.