Want to try some aluminums in my Habu Vyperkahn. For some reason i cannot download StuS calculator, Bow is 60" 50# @28, i draw about 27.5, so say 48-50#, bow is cut to center or maybe a bit past, it was new in 2009, i just bought it from a fella so i am not sure,bow will have an 8strand skinny string from Allen Schafer, limbs are triple carbon, would want arrows to be 29", (posably carbons?) Thanks Dave
not knowing all the other parameters...here is what I came up with as a POSSIBLE SOLUTION.
2213 shaft, BOP 29", 145 point, 30gr insert, 26gr nock, 3-5" feathers gives dynamic spine of 66.3
Habu Vyperkhan, 50@28, 27.5 draw length with a 10strand Fast Flight string gives 66.0 arrow dynamic spine requirement.
He recommends they be within 2 lbs of eachother and this is within 3/10 of a pound. This will give you about 10.2gpp at your draw lenght.
Hope it helps.