275 rds. magtech ammo. No stoppages. 2 rounds hit forehead area. This gun is up to at least 900 rds with zero stoppages using all sorts of ammo. Gun is an April 2011 edition gen 3 g19. I am consistently getting about 2 hits to forehead every 200 rds. the ejection is erratic in the sense that most are to the right. but about 10% go up, straight back, left, forward. not real upset about hits to the forehead as they are infrequent. thanks for reading.