John,
Thanks for the link. Don't know why I couldn't find it on their site. It should probably be added to the "where to buy" sticky reference. at the top of the forum. Anyway, the "Nickel Napoleon III" is the one that Dixie Gun Works has for sale.
If you decide to try a patched ball, you'll need to use a .675 or .680 ball depending on the thickness of the patch. A slug of the appropriate size should be cool too. Start with a light load and work up. If it recoils a foot when you shoot a piece of wooden dowel, it will come back a whole bunch more with a chunk of lead. :grin:
BTW, could you post another photo of the gun with a can of BP beside it for size reference?