Originally Posted by PhiPsi32
That's partially true. The push to "upgrade" police sidearms was prompted in no small part to the 1986 shoot out between the FBI and two bank robbers in Florida. The 10mm cartridge was developed at the behest of the FBI and led to the 40S&W which has become a very popular police and home defense caliber.
The stats for police shootings puts the hit rate in the low double digits. Police engagements are high stress encounters under dynamic conditions. So it's not entirely surprising. The benefit isn't as much the large capacity magazine as it is a cartridge that provides better end terminal ballistics.
Actually, the move toward auto pistols was well under way before the FBI's Miami Shootout. While Michael Platt was hit many times, nearly all the hits were peripheral. The 9mm got more flak because the one solid hit he received travelled up his brawny arm and into his chest. Although the wound was probably mortal, it failed to incapacitate him immediately. A lot of people claimed that a a .45 would have gone deep enough to sever the pulmonary artery and taken him out quickly. The load as I recall was a 9mm Winchester Silvertip. Agent Mireles ended the fight by killing both Platt and Mattix with a .357 loaded with .38 Specials.
We seem to be arguing, it it's that, at cross purposes: I agree that in general the .40 S&W is an appreciably more effective stopper, although both cartridges are loaded across a considerable power spectrum. This has nothing to do with whether a person is much safer with a high-capacity auto pistol than with a revolver. There are a number of good revolver cartridges that, appropriately loaded, can equal or beat the .40 S&W, e.g., the .357 Magnum.