Originally Posted By: Rockdoc
Could the holes be tapped and plugs screwed in with Lock-tite, then drill out the plugs where they pass through the bore and re-rifle where they pass through the rifling grooves. It might work, the holes are not that far down the barrel from the firing chamber.
Steve

My thoughts were the following. To use plugs made from ceramics. Then TIG welding the holes. Then rifling fixed areas. But I don't know would it work, maybe Chuck got some ideas?

Geno.