In their 2003 Reloader's Manual, Hodgdon (the company who manufactures H-110) shows a published MAXIMUM LOAD of their H-110 powder to be 24.0 grains behind a 240 grain Nosler JHP (jacketed hollow-point) bullet using Remington 2½ primers in Winchester cartridge cases.
In Hodgdon's tests, this load produced 1522 fps out of the 8" barrel used in their tests with 36,200 C.U.P. (Copper Units of Pressure)... very close to the maximum recommended SAAMI average pressure for a .44 magnum.
I use that same "stiff" load (24.0 gr. of H-110) as a "hunting load" in both my Ruger Super BlackHawk revolver and my Ruger old-style semi-automatic .44 Carbine.
Strength & Honor...
Ron T.