Originally Posted by
bigbuck1216
I just bought a new bow in sept. but once it was set up and ready i SPEED checked it and for a bow that is IBO'd at 340-350 the best I could get was 268 or 286 now for 70=lbs and a 30 1/2 arrow it should be well over that...any ideas? I have been told it could be cam timing but im not sure....HELP
What's your draw lenght?, and do you know what your arrows weight?
For every 1" of draw lenght equals 10fps, i.e. your 28" you lost 20fps from ibo spec.
For every 3grs of arrow weight equals 1fps.
1 lbs draw lenght eqauls 1.8fps
If your cams were out of time it would affect your group size.