Re: Detune Excalibur
3D rules state an arrow must be going less than 280 fps OR the arrow must weigh no less than 5 grains per pound of draw weight. So I'm guessing that unless his arrow is 750 grains on a 150 pound pull it would not be considered legal. You can get special rope to slide into the shaft to add weight and for some arrows you can get shaft length inserts to help bring your weight up to legal. Another option is to cut and slide a standard size shaft into the bolt....or whatever size fits snugly.
Chris
"Do not go where the path may lead,
go instead where there is no path and leave a trail."
Emerson