Quote:
Originally Posted by Whitehart  Also where the groups were the smallest the arrow speed also increased. |
This is a bit of an illusion. Measured arrow speed is not the arrow linear speed but the time of travel of the arrow point between two planes. Measured speed out of the bow can be up to 2fps say below the actual speed. The better the tuning the nearer the measured speed is to the actual speed.
This phenomenon has been used for fine tuning button spring pressure.