It seems to function fine when shooting. The first 500 rds were with the same ammo (XM193 and handloads) and I did not have any problems during that time with that same type of ammo.
If you are loading the ammo,,, are you using a Small base die????
I made the move to small base on all that I re-load,,
test,, black marker the whole round,, put in in a mag, and chamber it in the gun,,, if it will fit,, pull it out,,
then inspect the round,,, you will have your truth,,
Jim
I am using the dillon .223 dies. It does the same with factory loads and reloads. Also all the rounds pass the JP case gauge.