There's .44 Mag rifle data(tested with a 20" barrel) on Hodgdon's site. Their 240 grain jacketed data is the same for rifle or handgun though. Only difference is the velocities with the different barrel lengths. Handgun loads were tested with an 8.275" barrel. Handgun data goes to 355 grains vs 300 too.
The ballistics will be different. The powder charge isn't the ballistics. Ballistics charts, when done right, have the bullet drop and velocity loss at various distances.
Rummage around here for tested real world velocities by barrel length.
http://www.ballisticsbytheinch.com/index.html
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