3or 4 times.
I posted the first one here in Oct '02. I got a lot of crap about it from a few trolls here about brandishing and a felony, being stupid and such.
2 guys and a gal tried to break into my house on Oct 31 about 2 am. They were beating on the door and around the house for about 15 minutes or so. I had enough and opened the door a crack and put my body against it and had my USP 45 out. They pushed it open and charged at me and I drew my HK. They stopped and finally convinced me they were looking for a different house to play a prank on a buddy of theirs. I let them go, watched them go to another house down the street and called the cops and filed a report. Yes, I did good and the cop told me it would have been a good shoot if I had fired on them. The kids were filming it all and the cop really wanted a copy of that tape. He thought it was very funny.
Working security, I almost killed an illegal while he was trying to run my partner over while fleeing the scene after trying to steal a vehicle when we caught them in the act. The Mesa Police ended up releasing them, no charges. The kid decided to stop his car after hitting my friend and I stuck the same USP in his face and told him to "ALTO, RIGHT FUCKING NOW!" He got the message. I was staging the trigger and it was nearly at the break point. He was about 3 more ounces from meeting God. 4 suspects were all taken into custody by us then released by PD.
I had a 50 year old immigrant road rager block me in after nearly broad-siding my car. He came out with a 4 foot 2x4 and started beating on my car yelling at me and threatening to kill me. I sat there with my 1911 in my lap, just waiting for him to break the window. He saw the gun and decided that I'd had enough. He left, I called the cops with a plate number. The cop was busting when I told him about me telling the guy "he shouldn't bring a stick to a gun fight." Charges were filed and the guy pleaded out.
There were others outside of my time in the Army. I haven't killed anyone outside of duty yet, but the night is still young.