Another thing you need to consider is your arrow length. I shoot a 27" arrow. Cutting equal lengths off both ends of the shaft will help get the straighter part of a shaft. I shoot the XT's and get very straight arrows when using this technique. As was already mentioned, if your in comp and have the extra cash, go with the pro's. I don't shoot for money and get more than ample results out of the XT's. Routine robinhoods and busted shaft ends and nocks is good enough for me.