Rack, I guess I'm only half the idiot you are. I tune my bows th o the nth degree and shoot fixed blade heads. But my hunting arrows weigh in at 316 grains. Last deer I shot quartering away and the arrow penetrated and broke the offside shoulder bone, flattening the stainless tip (Wasp SST Hammer) and bent the ferrule. Deer piled up after 90 yards. All this fro a bow shooting 237fps. How much KE is this?