This is my second time firing my M9. The first time, I fed 50 WWB 115 grain JHPs with no failures. Tonight, I fired 50 Remington UMC FMJs I had one failure to extract and the gun wanted to feed another round into the chamber. I also fired about 100 WWB FMJs, and after feeding one round the slide did not ompletely return to battery. Both failures were easily cleared, but I'm not sure if its me or the gun that caused the second failure. I'll probably chalk the first failure up to the Remington ammo that so many on this forum seem to have problems with.