As does the tiniest bit of torque or less than perfect release technique. Paper tuning is just as much a test for torque and form flaws as it is for bow tune. drthunder says, "...i aint been shooting to long." That immediately disqualifies paper tuning for this situation, IMO, because shooting form is still probably pretty iffy.

I had a bow once that shot perfect bullet holes with the nockset a full inch UNDER square. The guy at the shop did me a 'favor' and paper tuned the bow before I picked it up. I about had a cat when I saw the setup, arrow poking upwards at an idiotic angle when loaded on the rest. The arrow was nocked so low that the bottom vane was leaving tracks on the arrow rest between the prongs. He talked me into shooting it like that thru paper and, I'll be durned, it DID shoot perfect bullet holes. According to paper tuning true believers, that bow would be perfectly tuned simply because it tore a perfect hole.

I took the bow home, adjusted the tiller properly and actually tuned the bow.

I've also had single cam bows that had a sweet spot where they'd tune a perfect bullethole way to the inside of centershot.

Don't tell me about how wonderful paper tuning is. Too easy to get false results and, if your form is the slightest bit off, it's impossible to get good results.