I agree on lack of data. When i look at my dope card i posted...its a serious thumper out a long ways. Bad elk medicine. Bad anything medicine. My farthest shot on deer has been 250. But totally devastating to the lungs. Every deer I've shot since I switched to the hammers has reared up on their hind legs then ran for 40 yards...no matter where it was shot. Except for one the i shot in the chest looking at me. It reared up and fell over backwards. I've shot lots of deer with 200 gr interlocks...no rearing up. Its just an observation....no explanation. Kinda cool.