Why would it be a mistake? I dont have anything against alluminums. There a little heavier, and yea they bend, but they tune better, there straighter, and sometimes quieter. Carbons i like also. I shoot carbons right now but im going to shoot aluminums for indoor cuase there bigger and slower so i can control them better. Carbons wont bend, they supposadly get better penetration, faster. So just go with what u want and like.