While this is not an exact comparison it does help to put things in perspective.
Thanks Slapout !
Why the need to 'double tap' when one will do, center of mass
Here's what Jim Higginbotham, 30 years as a LEO had to say:
http://www.sightm1911.com/Care/45acp.htm
While I have come across some lethal encounters that took a lot of rounds to settle they mostly were the result of either poor hits (or complete misses) or lack of penetration. Nearly all of the high round count cases I have reviewed involved 9mms, .38s, .357’s or smaller calibers. This is not to say they do not occur with major caliber rounds. It is to say I have been collecting data for 30 years and have not encountered many cases in which multiple hits (more than three as two or three shots are a fairly normal reflex action) from major caliber cartridges to the center of the chest have not been sufficient, - the single exception being a case involving the .41 Magnum loaded with JSP bullets which did not expand - they did penetrate - it took five hits center mass to stop the attacker - and I have not encountered any with the .45, even with Ball. I have encountered several with 5, 6 or even more hits to the center of the chest with .38, .357, 9mm and .223 rifle rounds failing to stop. Almost every one could be traced to lack of penetration with a couple of exceptions that hit the heart but just did not cause enough damage to be effective quickly. Note I am not talking about "torso" hits. There is a lot of area in the torso in which a hit will seldom produce rapid incapacitation even if hit by a 12 ga. slug or a 30-06 - we simply cannot count such data if we are going to learn anything.
My purpose here is not to argue Fackler versus Marshall and Sanow because that's a book in itself. What is important in all of this is that regardless of which philosophy you choose to accept as true, the .45 ACP comes out well--at or near the top of the effectiveness ratings for both schools of thought.
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