Not sure what the 'debate' really is here....
But after going through some training with the ATF & FBI recently I was even shocked as to how much someone can do after being 'hit'. Even with big calibers, full of adrenaline and any other 'artificial adrenaline', it's not like TV. They don't drop all the time after two to the chest or elsewhere.
With that being said.... a .22 in that special 2" zone around the head will drop them every time. Would I carry one? Nah... not unless it was all I had at the time or I HAD to have something that small.
Side note: Placement Placement Placement. One round accurately fired a second or two slower is MUCH more effective than 10 fired at MachII speed. You are responsible for every shot. If you don't know where they are going, who is to say civilians/innocents aren't in danger from your fire.
<stepping off soap box>
