NOT KNOWN DETAILS ABOUT BEST 9MM AMMO

I am able to only echo that. Just one may be "improved" than the opposite depending on the criteria. Commonly, the 9mm has my vote and I own more 9mm handguns than .40S&W. My two PPCs are also 9mm (Sub2000 & CX4). That said, I do just like the forty S&W lots and just acquired a Beretta APX that I really like.Purchasing for a dedicated carry pistol