7" from the muzzle is not a major problem. Pressure is very much lower there than near the chamber. If you keep the pit clean it will not get deeper. I think that efforts to hone out every pit in a barrel does more damage than good some times. Rather have one pinpoint pit than a set of barrels thinned just to remove tha pit.
If you want a pristine gun this is not one. If you want a very good condition gun this one should suit. Question is does one pit queer your deal? Have to be a fairly large one to bother me at that spot in the barrel.
