My gun hates CCI mini mag hp 1240 fps 36 grain. this ammo seems to have quite a bit of wax on it. I ran 300 hundred rounds thru the rifle yesterday and everytime i had 1 snag per mag.

Federal bulk as usaul ran flawless.. The ammo just doesnt seem to shoot as consistant nor does it sound/feel like it.

I also ran stingers and velociters thru it with no issues tho. Those didnt seem to be waxy like the mini mags tho. the gun really likes the hotter stingers, shots were better grouped with those.

maybe go back next time and give some subsonic and a few other ammo a try