40 S&W shy?
The laws of physics dictates that it does have a greater affect on a target. Imagine a 147 pound guy running at 14 mph and tackling you. Then, a 180 pound person doing the same. I like 9mm probably more than .40 because of cost and recoil characteristics, but to say that the .40 is not more effective than a 9mm at all is delusional.
When it has no greater effect on target than the smaller one that gives you more tries to stop the threat.
The laws of physics dictates that it does have a greater affect on a target. Imagine a 147 pound guy running at 14 mph and tackling you. Then, a 180 pound person doing the same. I like 9mm probably more than .40 because of cost and recoil characteristics, but to say that the .40 is not more effective than a 9mm at all is delusional.