Mystery Rolling Block?

by Bud, Thursday, July 11, 2013, 10:29 (4157 days ago) @ John K.

My 43 Spanish has a groove of 439. 459 sounds like a sloppy 45/70...but a chamber cast would be your best bet. What works for me (I'm no professional) wad up some TP and put down in the bore beyond the chamber. Coat everything above that with olive oil. Pour hot wax down in there....let it cool for at least an hour. Gently tap it out with a good sized bore rod that has large end on it.