by the sound of erratic flight it could be that you are torquing your bow which is causing them to not hit the same. also you need to tune your bh to your field points. another thing to check is do a spin test with your bh on to make sure they are in perfect alignment with your shaft. You also may have spine issues or may need a heavier arrow since you are shooting a really fast bow. easton has a tuning guide you can look at on how to tune your bh. hope this helps.