Hmm. Epoxy isn't going to fix that, I bet. That's a shame. A decent repair just might equal the cost of another Sterlingworth.
It seems to me, unscientifically, of course, that a high percentage of the "blowed up" gun pictures we see here, and, elsewhere, involve Fox guns. Better knock on wood that my really old Tobin is feeling up to par. Light English CIP loads only, of course.
Best,
Ted