I spent an hour this afternoon with Dixon's book and the chamber drawing. I did not find anything that (to me) would fit exactly, but some of the Peterlongo cartridges come closest. After that, maybe it is something by Collath.

You will probably be able to make cases from one of the rimmed European hunting cartridges, maybe 8x65R. The bore & groove measurements will make finding proper bullets a challenge, but bullets for a .351 Winchester Self Loading ought to work for your first experiments.

Last edited by waterman; 11/12/14 07:20 PM.