I have a set of tapered, the directions were to roll them as stated. I went one step beyond that. I tripled the weight on my spine tester and marked the most consistent spine spot on each arrow by trial and error. They would not fly in any spine orientation out of the bow I was hoping they would, but I got them to fly perfect out of a different bow. I had mine cut to my normal 27" bop, so I was a little limited on tuning options. I am not complaining as they fly out of the best right hand only bow that I have ever owned.