10.5x47R sounds like it might be it then. Might try a 43 mauser case & trim to length , anneal then push the shoulder back & neck size with a 41 mag die until it chambers & fireform to fit? Interesting on the 16 bore side, that is about standard BP twist rate. When are we going to get to see some pic's?

m-4

Last edited by m-4; 07/06/12 02:56 PM.