Magnus,

You'd like Kid Cossack's newest toy. He, along with the assistance of a few other Sixgunner Family Members have come up with a new wildcat cartridge that pretty well duplicates the old .476 Eley cartridge. It is a real hoot to shoot. Easy on the hand, highly effective on game.

You can read more about it at: http://www.leverguns.com/480/Default.htm