The one thing that many of the speed freaks leave out of this discussion on heavy/light is the effects of light arrows on the equipment. Arthur and I both grew up from old school as you say. Old school physics is still valid. Heavier arrows are easier on your modern day space age bows. It slays me that people say I have 80 pounds of KE and they're shooting a combination that could explode tomorrow. If you buy a reasonably heavy arrow(doesn't have to be outrageously heavy) you won't be anymore than a foot pound or two away in total KE than you would with a speed arrow that didn't push the envelope on weight. Heavy arrows also make for a quieter bow. I'm shooting a real light arrow now, 467 grains. I remember when I used to shoot heavy stuff.[8D]