Pure carbon vs pure alluminum , Ill pick alluminum . accs are great . I had good luck with the terminators allso , for a short time , untill I shot the spine out of them , every other type of pure carbon Ive tryed would not group . If they dont hit the same hole , or are atleast within a 1/2 inch at twenty yards they are junk to me . Allmost all the carbons Ive tryed are like 3-4 inch groups at twenty yards .