Jamesh76,for sure more than carbon,they have a much larger spine tollerance,15grs make a difference in point on them not so much with the carbon.I used alu for 20 plus years and it is easy for me to pass from one bow to the other just adding or loosing weight up front.One inch is a spine step, same like 15grs plus or minus on point,that in the bow is a equivalent of 5#.I quit now to use Alu for a 3 reason. 1:with carbon is easier to acheive a high FOC. 2:carbon are more silent. 3:carbon don't bent