44 mag is very versatile. I've used H110, 2400, Unique, Power Pistol, N350, No 9, No 7. Power Pistol is very consistent using loads in between 44 special and 44 mag. Same with N350. 2400 is really flexible in 44 mag. Lyman has data for cast bullets in 44 special using 2400 which surprised me because I thought 2400 needed high pressure to work well. It all depends on what you want to do with it. There is an old IMR manual that can be found that has has loads with really slow stuff like IMR 4198, 3031, etc. I tried IMR 4064 just for kicks and it worked, really soft. Bottom line is 44 mag will do a lot of different things and there is tons of data for it.