Over the years, I have witnessed a few handgunners whose shooting technique caused a particular handgun/ammunition combination to "Maxim." I had a nodding acquaintance with a man who owned a match-grade, semi-automatic pistol with which he had to be very deliberate in order to prevent firing a couple of rounds with "one" pull of the trigger, though there was nothing wrong with the firearm that was apparent to the eye. He asked a few of us to try and duplicate the problem, and none of us could get the gun to act up (IIRC, it only happened to him if there were a certain number of rounds in the magazine). Of course, off the pistol went to the manufacturer, and as far as I know, it worked fine for him afterward... I suspect that there wasn't ever anything wrong with it at all, other than that he and the pistol were a bad combination because of some (not so) simple physics.
Mr. niteowl77
I have a Kimber 1911. My Dad could get it to double fire all the time. I never could. Called the rep, and she walked Dad through the steps and said it was how he held the handgun.
Dad had huge hands.