I decided to use this head out of a Guardian that produces 79 ft/lb of KE. I was a little nervous because this is a HUGE head with 4 blades (2 inch cutting diameter). But, my concern turned out to be unnecessary. I shot a 100 doe at 40 yards with a quartering away angle. I hit her pretty far back on the entrance but my exit hole was about 3 inches behind the shoulder. My arrow blazed through her and was laying about 10 ft past where she was standing. There was very little blood trail. That is because she took 2 bounds and dropped. I have never had a deer go down so fast. I am attaching pictures of the wound channels. The entrance hole was good; the exit hole was huge. The pictures are a little messy because the shot angle took out about every organ possible (except for the heart). I am very happy with this head and will continue to use it when I have sufficient energy on whitetail deer. The first picture is of the entrance hole.