Because I'm 5 foot 3 inches with a 26 inch draw. Honestly I don't see the need to shoot over 250 fps for anything I do ( don't shoot 3-D). If my bow was faster I would probably just shoot a heavier arrow until I got down around 250 fps anyway. As it is I shoot closer to 200-220 fps with an arrow between 400 and 450 grns. As long as I know my range I normally hit what I aim at.

Paul