I have had the the chance to see virtually every pistol caliber in the world seen in action. Lets say post action, meaning I have seen people shot, and had the misfortune of taking care of these GSWs. The most common I have seen is the .22. Kills a lot of people, but I dont carry one. In the case between 9mm vs .40, please shoot me with the 9mm. That extra millimeter makes a difference. The .40 is typically a one shot ordeal, with the 9mm needing more than one shot. Obese people are not penetrated well with the 9mm and I have seen the recepients shot multiple times before the police felt they were no longer a threat. Rarely have I seen someone shot more than once with a .40 before they were incapacitated. All these things depend on the loads however. I bought myself two Glocks in .40 about a year after seeing their "true perfomance". I am not talking about the range, but the holes they make in people. I think the .40 is as controllable as the 9mm and my wife has no trouble shooting a .40 Glock. If you are getting a pistol, be sure to get hydrashocks or Golden saber or some other similar expanding round. Just stay away from the FMJ type rounds which are good for target. I have never seen a 9mm or .40 go all the way thru a torso shot. For your home get a cheap mossberg pump and load it with birdshot. I have seen extremities removed with birdshot at close range and you dont have to worry about it penetrating too many walls in your home before all the kinetic enery is exhausted.
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"When you are courting a nice girl an hour seems like a second. When you sit on a red-hot cinder a second seems like an hour. That's relativity. - Albert Einstein
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