The 44-40 seems to be a good cartridge for most useage and as stated the case does a good job sealing the action from smoke and powder residue. The 45C has it all over the 44 since the bullet supply is nearly endless, the brass is fairly inexpensive and readily available. It will work with black if you insist and case sealing will be improved if you anneal the case mouths and use fairly heavy loads. Case sealing in rifles is a bit of an issue since the chamber specs for the round are truly overgenerous. This just calls for more case expansion and working of the brass. I have a Rossi 20" carbine and it will shoot well with certain loads- mostly on the heavier end of the spectrum. The '92 is incredibly strong for a 120 year old design. Thw chambering in the 454 Casul bears witness to that. My carbine likes Hornady's XTP bullets and H110 powder. Using the loads near but not max the carbine will group 1 1/2" at 100 yds off the bench (3shot) with either bullet. The 300 gr XTP yields 1700 FPS with a heavy load of H110. This is in the 30-30 horsepower class out of and incredibly light carriable rifle. Deer and wild pigs dont survive. he drawback is the skinny little steel cresent butplate which bites hard with hunting loads.
