10,000 rounds as of this weekend and ZERO failures
As of this weekend, my G17 has had slightly over 10,000 rounds through it, and of all types of ammo. I have never experienced any form of failures...period!
In fact, one day, I was at the range, thinking of such posts, and people commenting that, "...any gun will fail if you limp wrist it." Okay, so I tried to make it fail. I held it just tight enough so that it would not fall out of my hand to the concrete floor. I emptied 18 rounds and had no failures.
I have always been told that it is due to Glock's ramped barrel, and the fact that the recoil spring is strong. In closing, I did a torture test on this G17 when it was new. I went 3,000+ rounds with never a cleaning, just adding oil from time-to-time. Again, no failures. I finally decided that it was simply time to clean it.
Doc2005