Shot alums for yrs., 3 yrs ago I got tired of bending, and breaking them on the many 3d courses I was shooting. So I bought a dozen carbons to try. I' ve never looked back. I' ve stuck them in metal objects. Pushed the nock back in, and was ready to shoot again. Carbons have come down in price now also, and are very comparable, some cheaper then alums now. They may not have the better tolerances as alums, and I do get 1 or 2 out of a new dozen that don' t spin perfectly. But overall they last longer, and have been more then satisfied with them.