Having not read all the replies, I'll throw in my two cents. Straighter arrows are usually better arrows. I say this re: spine and weight consistency as well. Spine is, IMO, THE most important spec needed for consistency. A couple of grains from arrow to arrow won't kill you but, the spread will be less with better arrows. With field points inconsistencies won't be as noticeable. But put on fixed blades, and arrow flight can get ugly. After the arrow leaves the bow, the best bow in the world won't make lousy arrows fly well.