TwoEyedJack
Member
I recently got a new upper from PSA with a 20" FN barrel. It prints the Tula 75 gr. HP rounds into pretty nice groups. The problem is that every other round fails to chamber. I think it is pretty close, since the hammer is usually cocked. I tried hosing down the bcg with rem oil to no effect. I also cleaned the chamber. Any tricks to getting this round to run? This upper has only about 200 rounds through it. Maybe it just needs to break in?