According to OT2 the whitetail 5000 has a static spine of 0.300. The programs suggests that with your bow set at 80#'s 26" draw and arrow with 100 grain heads should be around 0.4113 static spine. Your arrowsare pretty stiff (considering i'm not completely sure what your bow is set at and other variables like fletching ,and nocks, point weight) Hope this helps. I would recomend downloading the trial version of OnTarget2. It is a pretty neat program from what I have used of it. For $25 it is a real steal in my opinion. I think the 3000 model is better suited for your arrow length.