I don't know why.....but RJ told me to shoot my 82nd on 55#'s with a heavier arrow v. 52#'s with a lighter arrow......for a 3D setup (have to stay 280fps+3%). He plugged it in....and the heavier arrow won.

Huntingson....like you said.....(for a heavy arrow) 25yds is ALL I'm gonna shoot.....but more than likely, .....less.