45 acpactually, .40 is for the firearms connoisseur. Not everyone can handle the sharper kick, only to be rewarded by more force hitting the desired target. 9mm is for the plebian masses; soft hands, limp wrists, etc who begin to think they are Wyatt Earp with an autoloader. Whether it's drilling holes in paper, dinging steel targets, or punching a hole in the chest of a blm/antifa protestor, .40 will always be the superior choice.