I have been reloading for some time an the 357 Max is one of my favorites.
As for as powders, any of the faster magnum pistol powders will work for this caliber. My favorite is AA1680.
If hunting with this caliber, be aware most bullets are designed for lower or higher velocities as this is not a popular claiber. IMHO anything below 180 is too small for even white tails at higher velocities attainable in a 357max rifle. I shot a number of game with Hornadys SSP180. The last few deer I shot with it the bullets did not exit. They litterally exploded inside. I got both animals, but with much lost meat.
I switched to the Speer 180FP. I worked up to the same load and got about the same accuracy. I have shot one deer with that bullet. Simular placemant and thru and thru penetration and good expantion.
Good luck,
CW