I've had good results using M1873 Trapdoor Springfield-level loads with the 405 grain RNF lead bullet. Start at about 36 grains IMR 3031 and work up carefully. You can certainly load hotter, but don't try to get .458 Winchester Magnum velocities!

You have to really watch the COL in that Marlin M1895. Overlength cartridges will jam in the feedpath and you can not extract them without disassembling the action.