9mm vs. .45 ACP

[NicksDad1970]

I Googled it with no luck. But there was a report by the FBI I believe that was called the "one stop shot report" or something like that.

It basically said that the 40 had more knockdown power than the 9 and only a little less than a 45. But if it did go beyond one shot the 40 was best because of the ability for the 40 to get back on target vs the 45.