Not 44 but Ive killed several deer with a 45 colt at 950/1050 fps and different 250/255 boolit. Certainly enough to form an opinion.
It seems to me it's more like bow hunting. The big boolit obviously hit hard but without any real shock. They have to bleed out which usually happens pretty fast if hit good. Quite often they jump and look around wondering what happened.
If one bang flops I shoot it again. These loads will richohchet off back bones if not hit square. Twice Ive had deer jump up and run after the second shot. Both went about 20 yds. One would have died quickly from the first shot but the other would have healed up.
As Mr Gibson said, don't expect bang/flop. It sometimes happens but more often don't.