I was using the ole reliable g17 in a uspsa competition and had my first malfunction today but what made it bad was my son was shooting my 19 and had a malfunction on the same target. So im thinking it was shooter error since it was right after a mandatory reload and im thinkin (also suggested by a fellow shooter)both of us failed to seat the mag properly. Needless to say i got it from a couple of the non glock shooters about my glock "perfection". I now know i need to practice clearing malfunctions because i have never experienced one i didnt clear it in a timely manner. But over all it was a great day