If you buy alot of new bows then you need to change a little for optimum spine with each.All bows shoot slightly different and each arrow bow combo may needto be changed a pound or 2 to get you right in the middle.


From what I have seen and read from you,you would love a program and would benefit greatly from it.


They aren't that expensive either.


How do your speeds check with gibblet's findings? If they are right,thenI would say heis dead on.I always like to know how the bow actually performs before I put too much into what it says for arrow selection.If the speed is right,aa is dead on.Atleast for me it has been.