I started a thread below about improving the trigger. The rifle made it to the gunsmith but not for the trigger ( I did ask him to also do a trigger job ) but for misfires. When it does fire the case has a bulge all the way around just above the rim.
Anyone care to take a guess as to what is wrong? I'll post an update when the gunsmith lets me know.
ETA: I got the rifle used and it looked LN con. The smith broke it down while I was there and said it looked like it has seen very little use, still had the factory grease.
Don’t know what the issue is but sure am curious to hear the results. Because you say it has seen very little use I have ruled out the possibility of a built up lead ring from lots of use which would keep the cartridge from fully seating. Is the face of the chamber boogered up from dry firing?