You will get many different opinions on this one. I prefer paper tuning bare shafts and fletched arrows. Good groups are dependent on using proper spined and consistently spined arrows. Paper tuning is good for tuning the arrow for good flight. I never had a bow that wouldn't group good after paper tuning. Paper tuning gives a lot of infomation about the bow's tune and the archer's form. I want my bow to shoot great groups and have great arrow flight as well. I can get both by using the proper spined arrows and paper tuning.