2400 is an excellent powder for 38 Special, 357 Magnum, 44 Special and 44 Magnum.
Potentially unsafe loading data removed by Graybeard. Stick to loading manual supplied loads.
Try that with some powders, such as Unique and you will blow up the gun!
So 2400 is an efficient as well as safe powder.
Also, it is the powder that Elmer Keith used for the 44 Magnum. And he did a lot of research and testing.