Ah yes. The 44-40. If I had to pick an all-around cartridge, that would be it. It started out as a rifle cartridge for which there is a plethora of rifle loading data and it is not wasted in a handgun.
The wife and I each have a Puma Bounty Hunter in 44-40 and we have a Rossi rifle in that caliber. I will add an Uberti top break in 44-40 to round out that system shortly. (Off Topic Advice: For reloading the 44-40's thin skinned case, I highly recommend using a Lee factory crimping die instead of any other crimping die. I haven't lost a single case to crush since I started using one.)
Woody