About 10 years ago, I switched back to black powder only in all of my original 76's. However, the smokeless loads that Joe posted are all within a grain or two of the ones I used to use for all of these calibers. IMR 4759 is by far the best smokeless I've found for these calibers. It has been used by old timers for nearly 40 years in original 1876 Winchesters.
Adios,
Buck