While I have not used this ammo personally on Whitetails, a cousin has. He was shooting it out of a 8 /38" 629 Classic with a 2x Leupold Handgun Scope. He shot a really decent 8 point Whitetail at a range of 110 yards. The bullet destroyed the top of the heart and the bottom of the lungs, ran about 40 yards and piled up dead. Upon field dressing the buck we learned that bullet only hit a rib bone and did not expand too much at all.
SD Handgunner