I have an old milsurp pull through chain cleaning kit. After shooting my Winchester M100, I inserted the chain into the chamber with a cotton patch in a slotted patch holder on the end. It pulled through way to easily so i did this again with two patches, and we are stuck in the chamber throat.
Since the chain is hanging out the muzzle, I cannot push the obstruction back out. I've been unable to hook any of the material from the breech end.
I have come up with a couple of potentially hare-brained schemes: try to burn out the cotton... find something to break down the cotton fibers that won't harm the steel (haven't found such a magic substance yet)...