I would imaging the same powders that work well in the 7WSM and 7-300WSM. So RE-25, and H1000 would be a good place to start. H1000 should yield better barrel life and RE-25 a little higher velocities.
I haven't had a chance to shoot it in warm weather but I'm told that over about 80 degrees the RL powers will be hot. I'm looking for a powder that I can shoot prairie dogs in the summer and coyotes in the snow with the same drops.