I totally agree with the others here. Paper tuning is only a tool to get you in the right direction. I typically use paper tuning to get close to a bullet hole and while I'm there, test for fletch contact. From there, group tune, group tune, group tune. I usually won't make any changes till I shoot at least 3 or 4 groups of arrows and look at the groups I get. Then you can safely say that you need to make adjustments to get the groups lined up. One arrow can always be an accident...which is usually my case.