So my son and I took the min-charged 44spcl and max-charged 44mags to the range. Magnums were 12gr CFE Pistol, 240jhp, large magnum primers. His ported Taurus 5shot and my scoped 7.5 inch Redhawk. The Taurus was a fun handful with the magnums but pretty comfy with the specials. I wouldn't want to shoot a ton of magnums through the Taurus even being ported. My Redhawk digested both loads as expected. Grouped the magnums well at 25 yards. 6 rounds into about an inch I would guess.
CFE Pistol seems to be a good all-around powder and available. Cleans up easy too. Meters well. Not much muzzle flash or smoke even in the 4inch barrel.