Hi guys, I just bought a used 2002 Cougar and really like it. It has the fury cams and factory strings and cables. I'm shooting it at 27 inches and 63 lbs. I'm shooting Easton Carbon fury 45/60 arrows (not sure of the exact grains) with a whisker biscuit rest. My question is; The listed IBO on the website is 310FPS but when I shto through the crono I'm shooting only 239FPS. Why is this? Is there anything I can do to get it a little faster? I'm not a speed junky but that's a diference of 71 FPS.