I have one that you may not have seen before. The very short story is that a .357 case separated near the head and there's about .75" of case firmly stuck in the barrel of my .357 Old Model Ruger Blackhawk. Sort of an unwanted nickel-plated-brass forcing cone/barrel liner.
The freezing method didn't work.
The only idea I have that doesn't involve removing the barrel (I don't have the knowledge or tools) is a plug (brass would be good) that is exactly land diameter that can be tapped against the mouth of the case that is showing and that might be able to push it out.
I don't have a suitable plug or a lathe.
Possibly a carefully fitting tap? But certainly don't want to thread the bore.
Any thoughts?
Thanks,
Richard