Questions 1 through 9 remain "What is the wall thickness at the area of the bulges?" and without that information
no one can provide rational advice Red...but we are likely to do so anyway
This "pimple" on the outside
Looked like this on the inside
and may have been caused by the pilot while reaming the barrels.
Possibly your nearest barrel expert?
Kirk Merrington
Kerrville, TX
http://www.kirkmerrington.net/ 830-367-2937
Keith Hackleman (apprentice)
303-919-7376 cell
Dean Harris
Skeets Gun Shop
Tahlequah, OK
918- 456-4749