If this is just a hypothetical question, I am taking it as a vintage gun. Since you don't know the barrels wall thickness, and you say a .002 ring bulge (1/2 the thickness of a sheet of paper, I stated to use low pressure, low velocity shells just to be fair to the gun. Being that close to the chokes is no threat as the metal there is usually a little thicker, and as I stated earlier, I would do nothing with it if it were just .002.

David