Posted by Vodoun da Vinci: Theories in gun fighting and lethality and which calibers are the best are just that - theories.
First, the question has little at all to do with lethality; one can kill any human being with a well placed shot from a .22 Long Rifle.
Second, people who want to study the subject have more than "theory" to research.
This is an authoritative study based on scientific analysis and the medical realities of human physiology.
I have tried and tried to out shoot myself and the best, fastest and most accurate pistol in my hand is my Colt 1903 Model M.
I don't know what you mean when you say that you have tried to outshoot yourself, but I too like the Colt, the Savage, and the Beretta Model 1934. My problem with them is the operation of the safeties.
I prefer them all to a tiny six shot .32 with a small grip frame and a long trigger pull.
For reference I am not intimidated that the .32 will bounce off a bone, not penetrate, not kill. I have converesed at length with 2 ER doctors who worked at major hospitals in Chicago, Detroit and other nasty places and have conferred with other ER doctors in seminars from around thew world.
That the .32 ACP will penetrate is both demonstrable and undeniable. The problem with basing conclusions on the observations of a few doctors who have seen the damage caused by projectiles, as opposed to evidence of the defensive effectiveness per se, is that they simply have not seen enough to conclude much of anything.
As the report linked above explains quite well, the subject of physiological injury by penetration is a very complex one, and the relevant actual data are sparse indeed. There are just too many equations, and too few "unknowns". Anyone who has even a cursory understanding of the scientific method will understand that.
The only place a larger caliber is better is is marginal hits to non critical "shut down" zones. All things being equal (and they never are in a confrontation involving firearms) it doesn't matter what caliber penetrates the base of the throat and lodges in the spine.
That makes sense, but the question of how much better remains unanswered.
The key is accuracy, combat and situational awareness, tactics, attitude, rapid follow ups...
I don't think that "accuracy" is quite the most applicable word; the question is what one damages inside the assailant. If he's charging, luck is as great a determinant as accuracy per se.
And of course it is
his attitude, and not yours, that will determine when the and how quickly he stops.
...when deciding to shut down an attacker you have to *move* laterally and preferably to cover while delivering rapid, accurate fire to the upper chest (between the armpits) and to the base of the throat.
Good tactics.
If you are sucessful a .22 is as good as a .45 -
I really don't think so. The .22 is very lacking in terms of penetration and in terms of its ability to damage catastrophically whatever it hits.
Bullet caliber is *way* down the list in needs in a gunfight. Rapid deployment of a pistol (complete surprise), and accurate rapid follow ups to vital/critical areas while moving to cover and maintaining situational awareness are the tactical criteria. If you can do that with a high capacity .40 (I can't) you should do that. If you can do that with an 8 shot .32 then you should do that.
Excellent advice!
My perspective is not theory based on Internet Chest Thumpers - it comes from guys who have seen more dead folks from gunshots than most of us will ever see outside of a video game and have evaluated medically what killed them and how.
Again, there's the little matter of trying to analyze a complex subject with a very small data sample.