justin,No my oversight,not your mistake.Just another seniors moment! Reproof marks are normally seen on the barrel flats rather than on the barrel tubes, frankly I missed them!.I think you are likely correct that the gun was rechambered from 14 to 12G.I would be interested in knowing what the bore and choke diameter is on the left barrel.Choke may be excessive if the origional 14G barrel was full choke.

Last edited by Roy Hebbes; 11/27/11 08:13 AM.
Roy Hebbes