Thank you for the information! This rifle is currently chambered for the 38-55 which makes it i nice addition to my High Wall 1894 Win and 1873 Marlin. Pulled out a 9.3x72R to see if that could have been the donor for this rifle but no way as it is too long.
I received the decapper with a german cape gun. I thought the 11mm might be a 11Mauser from the poor pictures but even as appears to be the same shell this one has only a 2" case and the H. Utendoerffer headstamp has 1876 not the Nurnberg that i would expect. Sometime will post the Cape gun and shells.
Bill


William