George, ".41 Mauser"? Can you explain and tell us where you get ammo?
I believe I misspoke in an earlier post and called my .43 Mauser capegun a .41 Mauser. Had to check back in the thread to figure out what you meant. Sorry for the confusion.
The .43 Mauser is an obsolete black powder German military round very similar to our 45/70 Government trapdoor. Popular in Africa around the 1890s era. Approximately 11 mm.
Last smokeless for black commercial production I am aware of was Canadian Dominion brand. I found a cache of old CIL/Dominion ammo and use it most of the time. I know, I probably ought to sell the ammo on the collector market instead of shooting it.
I also use a custom reloader, <
http://gadcustomcartridges.com/>. This gentleman reloads a number of obsolete or out of production cartridges at a reasonable price...Geo