Atrain...let me give you a little hint. And keep in mind the context...we're talking about commonly carried, defensive handgun calibers.
Incapacitation has nothing to do with:
- "Knockdown power"
- "Stopping power"
- "Energy transfer"
- "Hydrostatic shock"
Plain and simple, it has to do with blood loss. Most people stop or fall down when they've been shot due to psychological reasons (ie: that's what supposed to happen when a person gets shot...they've been "trained" to react that way) more than physiological reasons.
None of the commonly carried defensive calibers has enough mass or energy to "knock down" an average sized person. They just don't. Know matter what gun magazines you've read or what you've heard.
Let me put it to you this way:
In June 1994, Nicole Brown-Simpson, former wife of star pro-football player O.J. Simpson, was murdered on the secluded front walkway of her condominium when someone cut her throat with a knife. How long do you think she remained conscious and able to perform willful activity? How much kinetic energy do you think was "transferred" from the knife blade to the soft tissues of her throat?
Now...go read the rest of the article HERE. And search around the FirearmsTactical.com website. It's full of great information about ballistics and wounding even though it's a bit dated.
The only real advantage a larger caliber will have is a larger frontal area that might be more likely to rupture something important and cause more bleeding. But any bullet has to penetrate far enough to get to the vital stuff.
Really, dude...you need to stop with the old cliches and gun-rag mythology.