As near as I can tell, somebody didn't like 10.75x68 chambers and ran a short mag. reamer into it and had dies made. strictly a wild, wild, wildcat of unknown name.

Should thump pretty hard on both ends as it was light as I recall. It should do anything a .416 taylor will do and maybe a touch more. As I recall the cases miked something around the 68 mm with a neck about .40 maybe or a little over. Definately one of a kind I am sure.