Thanks for your prompt response and forgive my late one. The gun is black powder proofed and none of the other things you mentioned are available

The gun in guestion was a Grade C (probably actually made by Webley) which I was negotiating with Champlin for but I didn't buy. THey say appropriate loads would be 190 Gr BP with a 565 bullet. They claim about 1600 fps with the above.

Latest project are 2 percussion Lancasters that we can't seem to hit anything with. Bores mike at 757 and we are playing with molds and loads.

More Later

Lindisfarne