2400 is my standby powder and 14.5 grains of it behind a good 158 hard cast and/or gas checked SWC is an old standby recipe for power and safe pressure in any handgun. Blue Dot burns too fast for max efficiency from a 4" or longer gun, but is better in a snub with 125 grain bullets. 2400 is too slow for light bullets in snubbies. I've proven this to myself with my chronograph and various handguns.
If you fire a 125 grain bullet using 2400 from a 2" revolver, you will not believe the fireball. You could catch your curtains on fire in the house with it, LOL!