I have been loading a light COWBOY ACTION load for my Shooting Partner for 15+yrs. It's not in the any currant manual. It comes from a HODGDON COWBOY ACTION DATA booklet from 2003. I load 5.5grs TiteGroup under a 240gr RNFP. In a .44Mag case. HODGDON lists a range of 4.7grs-starting load to 6.2grs-max load. it shoots light and clean.
For a Heavy Target Load I like a 250gr Keith bullet over 9.5grs Unique. I know you didn't list that powder but it's a pleasure to shoot and gives enough recoil so it doesn't feel like a .44spl.