Draw length vs velocity, 30# R3 limbs, 567gr arrow
32" draw - 165 fps
28" draw - 130 fps
I was impressed with the velocity I measured at my draw, it almost seemed like too much. So I taped an arrow at 28" and did some short-draw over the chrono. 130 fps give or take (128-134).
It's a lot of gain from the longer power stroke, and added draw weight of a 32" draw.
