You probably know this, but the .44 Magnum (according to the pic on your website) was never a black powder cartridge. There was a .44 Russian and a .44-40, both of which were blackpowder originally. The Winchester 1892 was chambered for .44-40.
The Winchester '94 is chambered in .44 Magnum (I own one), among others. Very nice guns, too.
I like the wood grain texture on the rifle.
Sorry, but I can't answer the smoke question.