I've made a lot of ash arrows in years past. Tapered shafts seemed to fly a little bit better for me. I made up a number of arrows from several different spine groups, cut them to the length I wanted, put 160 grain points on (broadhead and field) and then shot them out of my various bows until I found the group that shot the best. Then I made a note for future reference for that bow. I always weighed and spined each finished arrow and grouped accordingly. Sometimes the lower end spine of one group went better with the higher end of the next group down. I really like the way ash shoots, but as with anything that's not totally manufactured, there are idiosyncrasies from shaft to shaft. It seemed that I always had a couple of arrows in each group that didn't shoot very well no matter what I did, and several others that were outstanding. I weighed, spun, spined and could find no apparent difference. The inconsistent arrows went into the "cat hunting" stack.