I keep my 930 loaded 7+1 with Federal 00 buck and I've been having some issues getting the second round to feed. I charge it, ejecting the round in the chamber, and the bolt either locks open as if the gun were empty or it just doesn't release anything from the magazine. I'm pulling the charging handle all the way to the rear every time. It occurred to me that maybe the 7 shells were putting too much pressure on the shell stop so it couldn't move out of the way to let that round come out of the magazine but I have no idea what to do about that if it's the problem. Other than loading 6+1 of course but that doesn't really solve anything. Any ideas on what the issue may be? I took the gun apart tonight, cleaned the bolt release, and polished the shell stop where it contacts the brass but when I put the gun back together, it's still doing the same thing intermittently.