I think he would stick with the 44 magnum. Some folks are "a scared" of the old 44 magnum and that's too bad, it is a great cartridge. Love it. Personally I think if you are going to be DH and shoot one handed, like he did in the movie, then the 44 magnum is about the reasonable limit. I shoot a 44 magnum one handed. The gun does pop up pretty good and there is a recovery time in bringing it back on target.
So...going hog hunting in Georgia- Yeah, I might try one of the heavier guns just for fun, but for a DH- I'd still use the old 44 Mag.