I have a Sears and Roebuck model 53 in 30-06 caliber. From all the research, I've found it to be a re badged Win, model 70. I got it from my son in law who shot pretty good groups with it at least at 50 yards. After careful inspection, I swear there is a small bulge in the barrel about 1" back from the crown I can see and feel with my fingers but, the crown looks fine. What could have cause this barrel stuck in mud etc.? And I guess I should take the barreled action to the smith and have a little trimmed off the barrel and re-crowned? Thanks!