I had a glock in a 9MM for almost 15 years. Put piles of rounds through it. I finaly traded it this year because I want a bigger round now, 40 or 45. The only time it ever had any problems was if I used range reloads. Then once in a while it would not eject a spent round like it should. Since I moved from Los Angeles I don't find the need to have a hand gun like when I was there.