So far this year I've been super impressed with the Sevr 1.5 heads. They fly great (no surprise) and penetration is very good for a mech head. I shot an antelope at 35 yards bedded and got a pass through and he went about 100 yards, which is no surprise based on the shot location and species.
The next day I shot a huge bodied whitetail at 64 yards on a very strongly quartering to shot. I compensated for the heavy angle by aiming just inside the front right shoulder. The arrow hit perfectly and penetrated about 20", driving through the shoulder muscle and lungs. The deer went about 50 yards. Before the ethics police rip me for this shot just be aware I'm not bragging or condoning the shot, but I took it and that is that. I am now reporting the results because others might be interested in the outcome when deciding on these heads. For me, this was a big confidence booster in terms of shots that go south with this head.
Blades fully deployed on both shots, remained deployed, no blades were damaged, the head remained perfectly intact, and there was no deflection on a long-range shot at a strong angle. Based on the results I'm planning on trying these out on an elk in the next couple weeks, provided of course the elk cooperate.