David-

You have a very nice hammer gun, looks to be in beautiful condition.
I am very interested to see the muzzles.

Also, noting the beautiful damascus barrels, I'll strongly suggest you stick with black powder loading for your load development. I doubt this rifle was ever proofed for nitro, and since it's a 28b, and a paradox, the experimentation could cost you (at least) your barrels.

--Tinker