I guess Cody it depends on which way you want to go with killing a deer. My 270 FPS 150# Horton had pass through every time except on a spine shot and another shot I will not talk about. More KE is not needed if we stick to what the original concept is for killing a deer which is lung shots. But if we are wanting to change and help with accidental shoulder shots then more KE is needed, but not for lung shots IMO. My Excal only makes the arrows deeper in the ground then the Horton did after the shot.