I have been taught to papertune from about 5-6ft, then about 12ft and then maybe 15+ft. That way you can get a "picture" of what your arrow is actually doing. If you stay at one distance you may hit the paper "in between" oscillations and think you are paper tuned. Papertuning, to me, is just a snapshot of what the arrow is doing right after leaving the bow and multiple snapshots at multiple distances give me the best "picture".