Our experience with the .44mag in a Carbine rifle was 1-inch groups with our handloads and around 1.5 with factory ammo at 50 yards. Now at 100 yards I shot 2.5 to 3.5 inch groups using iron sights and factory ammo was closer to 4 to 5 inch groups.
We never shot at any deer futher away than 75 yards and at that range and less, they died quickly using our handloads.