The .44 Magnum is good for deer, and with the right ammunition and the right shooter, everything else as well.
I have used a Ruger Redhawk .44 on two deer and three hogs. The deer were DRT, one at 25 yards and one at 35 yards. Two of the hogs, shot at 40 yards and 50 yards, were DRT. The other one, shot at about 65 yards, staggered around like he was drunk and then collapsed about five feet from where the shot impacted. Shoulder shots were used on all of the animals, and all bullets penetrated completely. The load used was a 240 Hornady XTP handload averaging 1450 fps. I sight in dead on at 100 yards.
Like Marshall, I also have a Super Redhawk in .44, and I like the Redhawk better.
Just my .02,
LeonCarr