I just began building my 1st AR10 from PSA gen 3 in 308. For some reason the round is so tight going in the bcg won't close completely. PSA sent the wrong barrel the first time & i waited 3 weeks to get this new one in hand. So i REEEEALLY don't want to send another back. I've ran bolt rifles for most of my life so this is a new animal to me. Im green to say the least. I tried multiple brands of ammo with the same end result. This is supposed to be going coyote hunting in 2 weeks,any idea whats causing the problem? Thx for any advice.
