Joe, I worked on the project of developing shells for the 10 bore for several months. Life would have been easier if it had been a 12 or 16 ga or any gauge where the modern shells are one piece including the base [ala Winchester AA type]. These can be converted by grinding off the brass rims to fit the pinfire rim recess. Unfortunately no such 10 ga. casings were to be found. With the help of you and others who generously told me of their experiences, I was able to develop a custom brass hull [Rocky Mt. Cartridge] and then modify it to pinfire. The story is a bit long to write here, but finally I have reliable ammo.
Last edited by Daryl Hallquist; 11/03/13 03:29 PM.
