I'm able to only echo that. A single could be "improved" than one other dependant upon the conditions. Frequently, the 9mm has my vote and I have a lot more 9mm handguns than .40S&W. My two PPCs also are 9mm (Sub2000 & CX4). That said, I do much like the 40 S&W a lot and just bought a Beretta APX that I actually like.There probably wasn’t a 9mm p