It's been said here before....... A 9mm is a .45 set on stun.
"Those who fail to learn history are doomed to repeat it; those who fail to learn history correctly -- why, they are simply doomed."
Beneath is my trusty old Argentine Systema '27 with Pachmyer grips. The sights on it were badly battered, so I replaced them and filed the rear notch out to about twice it's original width cause... I like 'em like that.
I think stopping power is a confusing term. A 45 has no more stopping power than a 9mm since the ratio of the weight of a human against a bullet, even the size of a 45 caliber is too great. A 45 does so much more damage that the person hit will fall faster than if shot with a 9mm. The image of someone flying backwards when hit with a bullet defies the laws of physics and is the creation of Hollywood.
I have a Taurus 45 millenium pro. Good conceal weapon. But I still like my bushmaster
Also, my Pa, who is now with his Lord, Jesus Christ (accepted Christ only hours before his death), was a former Marine, one of the best shots I have ever witnessed, and a former Flushing (Michigan) police officer, never carried anything different than a 1911 .45ACP. He despised the 9mm round of any sort! Right before he died, he swore by the Kimber Ultra Carry pistol chambered to .45 ACP. He told me that anything less an a .45 is just that, less.