AWFUL CLOSE
If you look on IMR Trail Boss handloads on the net, it has 5 loads for the 32-20 Win. think they go up to 115 gr. bullet, for a revolver loading, the 115 cast bullet states 2.2 gr. Trail Boss at 642 fps. to 2.5 gr. at 707 fps. but have nothing under rifle loads. You might try Castpics a source for cast bullet info.
Reno