My standard test setup includes 4" right helical vanes. With these the heads shot very well, but when I switched to 4" straight fletch and an untuned bow they didn' t do so well. Not that any head would, but the fact that the package say' s " no tuning required, just screw them on and hunt" Made me go the extra mile. With a tuned bow and straight fletch they shot fairly well, but not like field points. I don' t normaly go to this much trouble when accuracy testing and I am not normaly this hard on a head as far as accuracy goes, but when you make statements like the one above you better be able to back it up or I will call you on it. They shoot well, but no better than other quaility heads.