Kinetic Energy is a law of physics but not an instrument used to measure penetration.
and the very next half of the paragraph...........
It is a product of and is dependent upon mass and speed. It is logical . . . to me at least that the greater the KE the more penetration we can expect
I think people are failing to see the jist of KE.....its IMPACT oriented. KE does not drive an arrow through, Momentum is what keeps the arrow penetrating. Granted there is other factors then just these two but you are only looking at these two subjects at hand. Not to mention one takes one factor in account twice as much as the other and the fact these KE and Mom are both relating to different factors of the total penetration scheme but yet still KE seems to be the big factor. Why? Hype, market sales, a simplier understanding maybe?
Granted you need BOTH, but whats more important when your hole goal is penetrating an animal, a high KE or high Mom? ON whitetails, it really shouldnt matter, even with my longbow I can drive through shoulders on whitetails.