I put 637 rounds through mine today and I had one light strike that fired the second time and two rounds hung up on the feed ramp when I hit the slide stop on a full magazine. Both were bulk HP rounds and after that I didn’t have any problems. It does not like subsonic ammo. I put 10 rounds of Aguilla 40gr and the first 5 rounds ejected, but didn’t have enough energy to load the next round.
Range was 10 yards and I was shooting as fast as I could load the only magazine I bought.
Ammo used:
CCI Stinger 50
Federal black 100
Federal Auto match 50
Federal bulk 50 Winchester black 50
Winchester 555 bulk 50
Aguilla super 50
Aguilla subsonic 10 rds 5 failure to feed
CCI Blazer 50
CCI ar tactical 152 Winchester wildcat 35