Thanks for the replies. I was finally able to get a shop to listen to me about believing something wasn't right on the bow. They found out that my idler was leaning using the bow plane laser. Now that 360 grain arrow is tearing on me, and the proper, heavier spined/grain arrows (for my setup)seem to be tuning better for me now. Now I'm back to several arrow options again as opposed to only one. And I think I'm going tostaysomewhere in the 400's. Thanks again for the feedback.