Handgun stopping power is simply a myth
Handgun stopping power is no myth. Bad shot placement is NO myth, (this is why the person being shot was not stopped) by either LEO or anyone else, this includes the FBI and any other organisation one could name. In any high adrenalin charged incident, and believe me a shooting is just that, all fine motor skills go out the window, the "good guy" is so pumped up he forgets the most basic lessons taught.
Most LEO's and the FBI just do not shoot enough rounds downrange, they concentrate on other aspects of their job, the same as police. Watch some of the training videos from the some of the top counter terrorism organisations, they are on Utube, these guys practice a great deal, in very close quarter drills, and they still stuff up, as we all do.
As for actual stopping power, I will take a .45, or .40 over a 9mm any day, 1 shot will resolve the issue, mostly using +p or +p+. However in using a heavier calibre the chance for the 2nd or 3 shot is slower as the recoil of the firearm takes the firearm off target. However a good shooter can shoot numerous shots accurately in quick succession, but that is always on a range, funny about that. As for 7.62 round is the way to go, not in suburbia or in a close confined area, to difficult to conceal or get on target.
When shooting at a target, the centre of seen mass is the way to go, no head shots there, and some at 7 metres still miss, guess some need more practice.
“When all about you have lost their heads and you remain calm, perhaps you do not understand the problem”.
Per ardua ad astra.