I didnt believe it either, but guess what, my groups didnt shrink until I bare shaft tested out to 20 yards. I`ve been tinkering around w/ it for a year & when I finally listened my groups shrank dramatically. As for paper tuning I agree that it is misleading. I shot compounds for 25 years & worked in a shop for a few years. I could paper tune a bow for someone but they couldnt get it to. Happened all the time. My personal bows were never paper tuned. Just lined the arrow up w/ the cams & sighted in. The nocking point was the more critical aspect of a compound. But bare shaft tuning does work. Mike