I have been using 2400 for over 40 years now when I first read about it in various gun mags. IMHO there is none better for the magnums. 2400 has been around for many years now.
I have tried my share of the new powders, however as accuracy and performance have always been important to me, I returned to 2400.
Unique is another powder that has been around forever. I have tried the new similar powders but returned to Unique. Unique performs well in 357.
Agree, 296 & 110 would be my second choice.