Than I would do as he sticker says and stay with heavier shafts and never try to shoot really ultra light shafts like the 335 grainers that I fling.As far as the 3 grains,don't worry about that at all. I'm willing to guess you have a few grain variance in that dozen of Goldtip anyway.Stay around the suggested minimum just in case something happens to the bow.That way you won't have warranty issues should the need ever arise.Good luck and good shootin'