Carbon ring. Try cleaning your throat and chamber with JBs bore paste if that doesn't help you might have out of spec ammo color a case with a sharpie and open and close the bolt a few times that should tell you where the tight spot is but I'd JBs the shat out of that chamber too.

Last edited by 1bamashooter; 02/05/24 10:19 PM.

Keep your booger hooker off the bang switch.