Coug, the KE stuff started up when people began using ultra light arrows for 3D shooting, then decided to use those same arrows for hunting. Always before, archers used light arrows for target and heavy arrows for hunting. Easy, smart and simple. Not good enough for these 3D guys though! They figured that if they can shoot 3D deer at 50 yards with their little twig arrows, then they'd be able to shoot real deer at 50 yards in the woods too.

So, then they had to start doing all these mathemagical gymnastics and calculations, trying to figure out if they had enough power to actually kill an animal with their target arrows. Then they'd sit around at the end of the day, bragging about how much speed and KE they're getting. They still do, come to think of it.[8D]