I can't help you much with picking a reddot, as I've yet to find one with which I'm completely satisfied. At least if you want to adjust it "on the fly", whilst changing distances! Including two Ultradot Matchdots, one with the bigger objective, forget the model name variations.

If you get a good 75 yard zero, and hold under for 25 and 50 and over at 100, then most decent reddots will do. Won't do for 50-200m work, though!

If 100yds is as far as you want to go, then I'd start with one of the lighter units. (Shot some good scores with a 75yd zero for the .45Colt 625PP, until I swapped out the Trijicon RMR for another one. Need to revisit that combo at some point, I think it's now wearing one of the Matchdots!)

BTW, IIRC, for ~1000fps 200gr SWC .45 cast bullet with a 75 yd center hold, held on or just above Chicken foot, about on belly line for Pigs, and roughly "hole in horn" elevation on Rams. Would suspect CB .44 loads to be not terribly different.