44's are generally target grade guns. I would use the Magnum hull for best accuracy.
A well made bullet with a consistent powder will give you great accuracy. I would use hulls with the same headstamp, and load it with the same care we use when loading our 45 Wadcutters. A heavy crimp is not needed for light loads. Just get rid of the bell in the case for positive chambering.
My go to load is 6 gr Titegroup, Red Dot, Clays, etc. Also 8 gr of powder in the Unique class will work. I shoot Rugers and use Ruger-Only loads in them with the Nosler 240 gr HP and either H110 or 300MP by Alliant. The 300 is much faster than most other powders in the big gun, with an obvious increase in recoil.
I consider powder a fuel, like gasoline. I do not see a "magic" combination for handgun accuracy.
For the best Machine Rest accuracy, a Match grade jacketed bullet is the ticket. For serious plinking, a well made 200 gr Cowboy bullet by Missouri Bullet Co will please you.
I have loaded the 44 Mag since 1958, and am still impressed at its versatility.
Match heavy loads to the gun system. The Smith & Wesson will not stand up to continued use of loads suited for Rugers and other, more robust gun systems.