Most companies have a really crappy arrow selection chart for their carbon arrows. They give you a range of draw weights and arrow lengths and that's all you've got to work with. Carbon Express has a really good system to help you get the right arrow. Fill in the blanks in their calculator and it will come up with a number to add to or subract from your draw weight, then you can go to the chart. If you don't want to shoot Carbon Express, just use the calculated draw weight on the chart of the arrows you want.http://www.carbonexpressarrows.com/selection_guide_chart.shtml