I was shooting today getting ready for the season, when at 60+ yards I could see my arrows would kick the nock end hard right mid-flight. I'm talking 3-4 inches. Now my bow shoots pretty sweet. I always get perfect paper tears, and I can get field points, Muzzy's, Montecs, and Wasps all to hit in the same spots at every ten yard increment out to 80 yards (haven't tried past that). Was I just catching some kind of optical illusion due to the sun, target, or something else, could a bit of a crosswind cause this, or is it possible to have an arrow do that and still be perfectly broadhead tuned? Do I really need to delve into the depths of bare shaft tuning?