I put a set of the crossbow leaches on my Allegiance and they are holding up extremely well to my surprise. I think the speed loss is mostly unnoticable for the most part. Too many people fret of losing 5 or 6 fps. I for one have not noticed any difference is arrow drop when the speed difference is that low. I am currently shooting arrows with Blazers and some with 3" AAE vanes with wraps. The arrow weight difference is about 10 grains or so. They shoot the same group.