Otis, I believe you but I am shock. I would never have believed that you can shoot a deer with a 44 Mag. at 50 yards and not drop him (Even with a bullet proof vest). I have never shot a deer with my rifle. The Federal 240 Grain bullets that I shoot (according to the chart) have a speed of 1,380 ft/s at 100 yards and 1,015 ft/lbs at 100 yards. They do not rate them at 50 yards but they have to be significantly higher. I would believe that this should be adequate to kill deer within that range. I can't believe a muzzleloader creates more energy or speed than a 44 Mag.
I hope someone else responds with other shooting experiences.