I think you guys are all saying the same thing. What I see is a major factor for most B/H' s is spine. You can get away with a weak or stiff arrow with F/P because the fletching will help in the recovery. With B/H' s the blades will take over and stear the arrow unless you have 8" fletching. What I think the middle of the road implies is all groups (F/P,B/S&B/H) are hitting in the horizonal plain. Which will indicate good spine,center shot and sight line. The vertical line may vary slighly because of drag(B/H),weight and FOC(B/S). All to a comparision of F/P. So unless your B/H or larger fletching changes the spine of the arrow and puts you out of your F/P range all should group within an inch or two.

I think the difference between the two schools of tuning is the process you use to achive the spine,nocking point and center shot. Once these are esatblished the fine tuning will only go as far as your ability.

Here is a couple questions? What is the tolerence of center shot? Is it exact per bow or will one shooter have a different center shot then another shooting the same arrow form the same bow. Does spine effect center shot? If I shoot two different spined arrow from the same bow will I have to adjust center shot per arrow? JERRY




















is spine