Webberstyle said:
.40 Slow & Weak?
The FBI decided the 9mm was the premier choice for their needs (stopping perps) in the '80s. After a few disatrous results, they decided it was not.
They then ran tests on several other rounds, one of which was the 10mm. The issue with the 10 was too much penetration. That's right, too much. If you shoot someone and the projectile goes through the perp, you've not imparted the full energy into the target. This is inefficient, not to mention dangerous. the FBI found that they could use a 10 to shoot a bad guy, and the round would do a couple of hundred bucks wirth of damage to the wall behind the bad guy, and then have great expansion characteristics in the body of the innocent bystander on the other side of the wall.
Smith & Wesson developed the .40 based on those results, and the fact that the 10 was considered to be the largest
"controllable" round thasy would consider. They have a lot of female agents and smaller men, and apparently didn't want to soend a lot of time training them how to control big-bore handguns, so the .45 was nixed from their studies.
The .40 combines the higher bullet weight of the 10mm with the reduced recoil and muzzle blast of the 9mm. I've yet to find anyone who can't control my .40 at the range, no matter how small or female they are. For their purposes (stopping bad guys without having months of acclimatization training for their agents.
That's a joke, ladies, no flames please. There's a lot of high female percentage males here in the Bay Area, and some of the best shooters I've seen are female. There was an Indian lady in my group, she was 5' tall, weighed a buck even, and her weapon of choice was a Ruger Redhawk .44 mag, and no .44 Special loads for her please! She wanted the "Full Pull" magnum loads, the hotter the better!