The best way to restore this damaged rifle barrel- what we had in Vietnam with the M-60 MG- based on the great German MG-42 to some extent- barrel life was greatly increased when they used Stellite liners- Lauf Stahl-- most likely a nickel rich ordnance grade steel- I would TIG weld the proper sized alloy steel plugs, then have the bore reamed out, straightened, and then a Stellite liner with the same characteristics of the original bore as to twist, lands and grooves and either RH or LH twist-installed. Extremely expensive, and the gents are right about the greater pressure in the chamber area where some numbnut bored the holes-drillings are indeed fine weapons, what a shame this one was almost ruined- are the shotgun barrels in 16 gauge?
