Did you verify the speed gain by chrono? The vast majority of solocam bows would only gain about 16-17 fps by dropping 50 grains of weight, some how you manageed to gain 35 fps by dropping 50 grains of weight which every knowledgeable tech in here would tell you is a physical impossibility or at the very least EXTREMELY uncommon. By dropping 50 grains you should either stay at the same KE level or lose 1 foot pound or so. I think you need to run things through the chrono again and verify wieghts on a scale. The laws of physics don't bend for speed pro arrows or any other kind. JMO