Please nobody flame me for this, but I usually load a bit hot for my Marlin than I would for a pistol because imo it can take more pressure. I don't bump it much, and you can't anyway or your brass sticks. The only pistol in 44mag I've ever had was a Contender in 10" which are very strong, I load most of those rather light because full loads take the fun out in the form of pain, full loads are more for entertainment.
Since both my guns are long barreled I use slower powder as a general rule, usually H110 or 296, but I've experimented with Blue Dot as well which is more for mid to 44 special range power because it's too fast if you want power. If I tried any other powders I've forgotten.
So I guess to answer your question I'd consider slower powders on avg, which H110/296 is ideal imo. As for peak power it's not a prob at all in the rifle where it can be harsh on the hands in a pistol.
Something else is you might look is seating depth, many rifles can take a longer cartridge than a revolver which opens the door to more power. Crimp is another, a rifle doesn't need as much as a revolver, especially with a compressed charge. Less crimp = longer lasting brass.