I just got a g19 gen4 on Thursday. I took it to the range this morning and fired 2 and a half magazines of Winchester white box. The LAST 2 shots did me in. I had a really weak round that I am suprised even cycled the gun. The very next round failed to eject and LOCKED my GLOCK up tighter than a frog's ass! I'm posting this from the gun shop now. The dealer is a certified GLOCK armorer and he can't figure out what's wrong!