BobCo Let me amend my statement. In using the arrow chart for your selection you will have an arrow that is matched to your setup. Many experienced shooters tune their own equipment and have the knowledge to select lighter arrows or deflection that is tunable. By using the charts, a person that is new to the sport or does not have the experience to fine tune their setup can select an arrow that will perform for their weight, length of draw and style of shooting. The chart is a reference or recommendation, not the only viable choice.