Energy in the firearm world is a big deal. However, even in that world I want an exit wound. Exit wounds tend to leak, if ya knowwhatImean? That in a hunters world is a big deal, leaking critters that is. As for a broadhead, they kill an animal by hemoraging, period. There are others in the world that have at least a minimal understanding of physics, I happen to be one as I teach the subject.That said, I'm still firmly in the corner of broadheads doing their work by hemoraging. Kinetic Energy, how does that go? KE = 1/2 mv^2, or something like that....