I have a 500S&W pistol barrel from V.V.A well there no longer with us and the front forearm screw hole stripped out ...I can't go deeper with hole it's a tapered barrel and the hole is shallow to begin with (only 3 threads deep )
What can I do

??
And I don't want to warp the barrel
My thoughts
1 silver sodder or tig weld a nut on for permeant threads
2 fill in the old screw hole with silver sodder or tig and then redrill and tap
with those ideas I am worried about warping the barrel
3 and my favorite a barrel band made out of stainless drill and tap the band also make look nice and contour it fit snug where i need it.