Aluminum is straighter out of the box but spine is what is the most important factor and ACC's will have a more consistant spine a couple hundred shots from now over the aluminum.



ACC's are the best all around arrow on the planet right now,besides,ACC's straightness is .003 and will stay there practically forever.I will bet noone can tell if the arrow has a .001 or .003 straightnes when shooting it but I will bet most can tell if the spine isn't consistant.(most may not know why the arrows will not group but they will see that they are not grouping due to the spine.)Aluminum has great spine consistancy along with straightness but ACC's gives you as good or better penetration at a lighter weight and therefore you will have better speed and the ACC's will not bend as easily as the aluminum.