If it's a significant bulge, it may require removing the ribs to get at the bulge to reduce it. There are no secrets in removing a bulge, it is about gaining access to the surface and cold working it down by hammering, albeit some conformal tools can be helpful.

Once the bulge is worked out, a measurement survey should be done on the barrels to determine if any other work is needed. If they're thinner than desirable, Teague lining (not drop-in tubes) would be the "first class" approach IMO. You might call Teague about the whole job of removing the bulge and determing any other needed work. I'm sure they are fully qualified for the whole assessment and cure.