As some of you know, I love the MAXI!!!
I have tried about all available powders in my years with the Maximum. Every gun is different and what works in mine may not in yours. Mine is a factory marked 357 MAXI.
In my gun AA1680 is tops. A number of other powders where close. Like, RL7. It works well with the heavier bullets, but its also pretty bulky and you simply cannot get enough into the case. H110 and its twin W296, AA#9 and Lil gun are good ones to try as well.
As for primers, Remington Small Rifle match is my #1 choice. But I have touched off more than my share of CCI 400s too. Forget about the pistol primers, stick with the Small Rifle primers. I haven't seen the need for the magnum primers.
Bullets are another story. My #1 preference Is Hornady 180 SSP followed by the Hornady 180XTP and 158XTP FP, Speer 170 FPGD and the 180 Speer designed for the 35 Rem.
I have shot Small game and a number of deer with this round thru the years. With 1680 powder, my load and a SSP bullet will be a bit explosive at very close range on large bones. But I have never lost or even had a deer run from a good shot with one. 180 ans 158 FP XTP are also excellent killers. FORGET about any other 158 or lighter for big game. They can be down right explosive on wood chucks!!
CW