Measurements

[Bruce]

Jim,

When I have seen other people use your program , they have measured the distance from the peep to the nock at rest . But you show on the program to do it at full draw does this make a big difference ?

[James Park]

Bruce,
Yes, it would make a huge difference.
It certainly does need to be measured at full draw (so you generally need someone to help make the measurement).
If it is measured along the string the parallax calculation will be wrong and the sight settings for short distances will be quite wrong, and the arrow speed will be wrong as well. For longer distances the sight settings would be ok.
I have had people also measure the peep-sight distance without drawing the bow and in that case the arrow speed comes out way wrong (very much too low).
This was the reason I put the pictures in the program.