great rifle, ready for africa

whats your brass? RMC lathe turned with an altered rim? it looks like a center fire primer in the base but I suspect its lathe turned brass piece with the dimensions of a 209 shotgun primer with a hole on the side for a small muzzle loader primer you have to adjust for the pin. I make a special primer screw for my 4 bore gun that use center fire primer http://forums.nitroexpress.com/showflat.php?Cat=0&Number=327948&an=0&page=1#Post327948
have the advantage you can have the ammo loaded and travel without the pin so completely safe but if you want to fire the gun simply glue the pin into the hole, so you don't lose the pin. the massive hammer strike will break the glue metal on metal with ease, very safe priming.