Kegan, A lighter arrow will alwys fly faster than a heavy arrow. Funny thing about bows, all bows is that they become more efficient as arrow weight goes up and less efficient as it goes down. If you were shooting arrows that weighed 1# for instance there is a good chance that a very crappy bow could beat one of your fastest bows simply because it stored more energy and with a heavy arrow like that became almost 100% efficient. To take advantage of shooting light arrows often concentrating on ways to make your bow more efficient is more important than storing a lot of energy. You still want a good amount of both obviously but efficiency will trump the energy storage once the arrow gets light enough. In the 500 grain arrow weight range it is kind of a battle between the highest energy storers and the decent energy storing bows that maintain slighlty better efficiency. many of the things that store energy rob efficiency. The trick is trying to come up with the best compromise. A skilled bowyer such as Mark St Louis for instance ( sorry for using your name Mark) is able to build high energy storing designs and still keep outer limb mass at a minimum, that makes for a hard combo to beat, I concentrate on moderately high energy storing designs that allow me a bit more effieciency. When I am building a bow strictly for light arrows I still try to keep the energy storage up primarily by adding a little reflex but concentrate more on lower outer limb mass. Hope this helps. Steve