From my Invader the Swhackers fly just as my target points do. Nice and straight and hit the X every time. Match your Swhacker to your target points 100 125 gr. and your ready to go. Just wrap them with three uniform layers of electrical tap and fire away. I have found that through my Xbow anyways that the mechanical BH's fly better, more true than did the fix blades. Paper targets never lie.