Well, hell, we haven't had one of these threads in awhile.
Look, the .40 S&W was a .45 cartridge that was "downsized" by request of the FBI to make a big man's pistol capable of being controlled by smallish hands of diminutive and female recruits.
I carried the .40 S&W for YEARS and I never felt "undergunned" with it, especially in that I could carry a double stack of it.
Having said that, it's not a .45
It's slower than the 9mm, but hits with more "impact" and hits with less "impact" than the .45, but it's faster.
In a 180 grain hollow point, I think it would be devastating to the human body in rapid succession. Devastating. And this round is capable of delivering that if you have smaller than average hand size.
But a lot of the "stopping power" myths have been written over time. They take into account police and FBI shootings that happened 5, 10 and even 20 years ago when ballistics were first being studied.
Now, you take the average size of a defensive player in the NFl in say, 1985 and take a look at that exact same position today, you will see that it's grown by leaps and bounds.
The same is true with the human condition. We have evolved as a species into a larger, bigger, sometimes fatter, version of our parents. That extends to criminals too.
Look, my old man was 5'-11" on a good day, and weighed less than 2 bills, my mom was 5'-9". I'm 6'-2.5" and I weigh somewhere in the neighborhood of 240 pounds after losing 25 plus pounds.
A round that would have put my old man in the dirt in 1970, is going to be LESS EFFECTIVE against a guy my size today.
The same is true for the human condition and the use of handgun/small arms rounds today.
Somali. 1993. Battle of Mogadishu.
USA ELITE forces came up against malnourished, underfed people who were high on KHAT and just plain didn't go down when hit with 5.56mm small arms fire.
Society has changed.
But there is nothing wrong with the .40SW IF
you practice with it and get to a point where you can put multiple rounds on target in a quick fashion.
It's a great round, but it's no longer my primary round as I was enlightened by the 1911 platform and have seen what it can do to test media.