Measure your arrows for me. I need the length from the groove in the nock to the end of the shaft (don't include the tip length).

I don't think it's going to matter though, because my program showed the being weak at just about any usable length.

If your rest is set up so the arrow contacts the rest right above your grip and the arrow is 1 inch past that then that would be the correct arrow length and be around 27-28 inches. If that is the case you have weak arrows according to my software, but I will re figure it with that speed and arrow weight.

Paul