My favorite carbine load for .44 mag is as follows:
WARNING: THIS IS A MAXIMUM LOAD, AND SHOULD BE APPROACHED WITH CAUTION. BEGIN WITH 23 grains of 296, and work your way up .1 grains at a time!!!
25.8 grains of Winchester 296, behind a 240 grain Hornady XTP Hollowpoint. This sits atop a magnum large pistol primer, usually a Federal or a CCI. I use Winchester or Remington brass.
I get a little more than 1900 fps out of it. Plays hell on pigs, and shoots pretty flat for a bullet shaped like a brick.
I have shot the 24 grain/296 load out of 6" revolvers, and they are VERY difficult to eject from the cylinder. They are also painful in recoil.
They are NOT pleasant to shoot out of a handgun, nor are they recommended for such. Accuracy suffers badly in the shorter barrel, and recoil is FIERCE.
For 6" wheel guns, use about 12 grains of Unique, and the same primer and bullet. Very controllable, and accurate. Not a lot of flash.
For the short barrel guns like my 29-3, I use
about 9.5 grains of Blue Dot with the same bullet and primer. This gives about 850 fps, and manageable recoil, with very little muzzle flash. Pressure is about 1425cup, so it is actually in the .44 Special range.
I have tried and tried to get .44 magnum loads to shoot accurately in the short barreled guns, but they do not print well, and the recoil and flash are horrendous.
Impressive to watch, but useless in any practical sense.