When I hunted with a .357 Marlin, my goto load was a 200gr hard cast WFN over 6.0gr of Unique. That’s a great feral hog load and deer stalking load for under 50 yards; but, for deer at 75 yards or more I switched to a Speer 158gr JHP and 2400 powder. I really like the Speer for their economy and they do perform well but if I were spending someone else’s money I would buy the Sierra 158gr.
H110, 2400, AA No. 9, and IMR 4227 are the goto, best all around powders for .357 hunting loads. JMHO