[Chris_B]

Either way, the usual remedy for a bullet stuck in a rifle bore is to lube the bore, fill the other end of the bore with oil, and get a brass rod that fits the bore well, put a patch over the end to seal the bore, insert in into the bore as far as it will go, then smack it with a hammer. The hydraulics will force the bullet out of the bore far better than trying to drive it out.

^ this. I can't imagine it failing. A gunsmith is another choice of course. I imagine he'd use...Scorch's suggestion