Are you saying that 9" from the muzzle there is an area that is .021 thick in the barrel wall? And on top of that there is slight pitting. Unless you get on heck of a deal this might not be a great gun to own. .021 is very thin and it will dent very easily.
Unless the dent is too near your hand or face I doubt that it is the major problem. It can be removed, but what do you have? A set of barrels that are so thin, with pits that you are afraid to hone out so you are willing to only shoot one box of shells a year in it. Why bother? PASSADENA.
