Eastonarchery.com has good tables to help you compare your setup to their suggested arrow selections. Another choice, Archers Advantage has a good program which you can purchase for your computer. This program allows you to enter specific information for your bow and see how various arrow setups would perform. Additionally, you can enter sight marks and print out custom yardage tapes for your bow. I' m sure you can get your arrow weight down to 250 grains safely. This alone will probably pick up at least 30 fps.