I had issues with my bolt carrier originally. I believe i took care of the issue myself with polishing. I have about 100 rounds through since no problems at full gas(setting 4 i think) but the next setting down will not completely cycle 150 or 168 grain. 110 vmax are shoot fine a little light on ejection though. The highest setting shoots all super sonics fine without a suppressor. Is this normal operation? I figured a lower setting would work too like my xcr which i shoot one and two settings down.
I shot a box of 110 sabre black tip just now. Tried all settings no suppressor and they cycled regardless of which gas setting. Seems odd that 150 grain needs full gas to cycle. I dont think i have anything to be concerned about. 100 vmax will be my main defense round. Later when i get a suppressor i will figure those out then and probably use those for fun more than defense.
150 gr is a much heavier bullet with the same supersonic speed. You need more gas.