I've been loading for the .44 Magnum for about 50 yrs. I've tried a lot of powders. If I wanted to go with something that I could load from very mild to hot, I'd consider the Ramshot Line. With Competition, one can load the .44 Special down to the low - mid 700 fps. range. With a powder like True Blue one can go from mild to very warm loads like your interested in.
My old 1967 version of the Smith 29 never shot well with the old version of Unique. But it did really well with 5 grs. of Bullseye. Never shot well with the old style 2400. The new version, with standard, not magnum primers shoots quite well.
In other words, try different loads for m accuracy, etc. One of the things I've learned is a 250 gr. class bullet even at 800 fps. is a lot more potent than many realize. And the recoil and muzzle blast are far easier to tolerate than the high pressure loads many insist on. E
