Cwtebay, the sins against this action are already unforgivable, so a little blasphemy cannot harm its soul any further.
However, I am stumped. I can snake a piece of welding wire through one lug recess, under the bolt, and back out the opposite side. The epoxy is gone, yet the bolt remains stuck.
I purchased a longer cleaning rod, and was able to remove a fair amount of rust from the chamber. It is now sitting with an ounce of Kroil in the bore. If it fails to creep past the bolt head, then I can only assume that it is sealed tight by epoxy, rust …or a bullet.
The bore is clear past the nipple, but the rod goes thump instead of clang when it bottoms out.