Well I took my Glock girls out and got them dirty. Gen 3 19 FDE First time out 2012 built. About 270 rounds through her. Zero malfunctions. CCI Blazer aluminum casings to boot 115 gr. fmj. 20 rounds of my reloads 124 gr. FMJ Gen 3 G17 Police trade in about 2005 build date. Has a replacement frame from Glock recall. Shot about 30 rounds of Hot reloads 124 gr. FMJ Both ran perfect. I even used some old non full metal lined preban mags through the 19. Both guns have the 336 ejector.