Originally Posted by
popper
You can get barrel leading with PC or hitek. My guess,minor leading getting blown into the can(re-direction, it's real purpose). You didn't state alloy, I assume pistol gas. Check the BCG & tube for leading. Is it all Pb or some PC residue? When I had a F.H. on mine I thought I was getting Pb deposits, there was some but mostly (burnt) PC deposit. If that's the BT Lee, I haven't heard any good reports about it. IMHO, the BT & time-in-barrel leads to higher deposits.
powder coating it to bring it up to proper size Could also be the problem.