PM - not sure, but Markethunter on here may be able to provide further input. The usual solution I have seen in the past is the use of 4 bore brass cases, which I think can still be made to special order.

Also try dropping a line to "Double Four" who is a new member on here from the UK; has posted only on this thread, but is real expert/afficinado on the big bores and uses a double four on the foreshore.

Craig

Postscript - try this; http://www.rockymountaincartridge.com/page7.html

Last edited by CBL1; 03/03/10 02:18 PM.