Originally posted by NBK: Personally, I would set the nock at 1" above center and shoot bareshafts knowing that the nock will be high. Move the nock down about 1/8th" at a time until you're bareshafts are flying just a little nock high. Like Bear Heart, most of mine end up at 5/8ths to 3/4". To me it's just faster to set it really high initially and work down, otherwise you risk getting a false high read if you bounce it off the shelf.