A flinter you say? If that is correct you could un-screw its Vent Liner out of its flash hole (its slotted for a flat bladed screw-drive) and hold a really bright flashlight up against the empty flash hole Be careful not to strip the V/L's slot. It should offer enough light to get a reasonable look into its breech & bore area. Not the best lighting but enough to check for rust or a stuck ball.
If you can't see any light at all. Than there's probably a stuck ball or patch some-where's in its bore. And (it) would need to be removed prior to doing your bore check. But that's a whole different issue for the time being.
I have a 50 T/C hawken flinter barrel here and tried what I just wrote and it works. A small thin Flat bladed screwdriver and a bright flashlight are all the tools you'll need to accomplish this task. It would please us here to know what you found out. Good luck zbones6.
Last edited by Sure Shot Mc Gee; December 11, 2012 at 10:46 AM.
Reason: tweak here & there un-necessary wording.