Chad, I don't really think there is any advantage to shooting overspined arrows other than it might allow you to interchange different bows with the same arrow or allow you to shoot a heavier arrow. However, you can accomplish the goal of heavier arrows thru other means, such as point weight or shaft material. Using an overly spined arrow will reduce the forgiveness of the arrow and accuracy will suffer unless you have a perfect release every time. That's why I feel bare shaft testing is so valuable. It will show that while different spines will all shoot out of the same bow, one particular spine will be consistently more accurate in terms of right and lefts (windage) than the others and will allow for an occasional imperfect release. For this reason I don't papertune, because I've found that while I can shoot bullet holes thru paper, if my release is slightly off it will give me an tear rather than a bullet hole, even tho the arrow will impact to point of aim. Thus I don't think papertuning is a reliable method of tuning with fingers off the shelf. Just my opinion. Others may feel differently.

Jack