I used to shoot vanes that had a one degree offset and it was way too picky for broadheads. I don't really care if my arrow looses a few feet per second. I shot five broadheads the other night at forty yards. I had groups in the black dot of a block target at forty yards. I shot slick tricks, muzzys, montecs, dead heads and thunderheads. They all shot good. I am currently shooting a 380 grain arrow and 280 fps. Just my 2 cents.