(You need to Login   (You need to Login

If you have a GI 30/06 broken case extractor, it should do the job unless the fragment is stuck tightly. Otherwise, take the advice you've gotten elsewhere and pour a Cerrosafe chamber cast to haul out whatever's in there without the risk of chamber damage inherent in any approach with sharp-edged hardened tools.

  (You need to Login   (You need to Login
Example of stubborn separated case pulled with chamber cast. (Ignore the other stuff, not relevant to this topic.)