Last year I shot 4 blade 90 grain Muzzy' s. I spun the arrow with bh attached on a bh tuner, and the tips were rotating everywhere. I tweeked them a little, got them spinning perfectly, and didn' t have to do a thing to the bow. They shot the same as my feild tips. Before I did this, the bh' s were all over the place.

Are your bh' s grouping?