You don't have to use turkey loads nor turkey targets. Since you don't actually feel the recoil of a heavy shell in the excitement of shooting at a turkey, a field or target load is just fine. While a pop can is bigger than a turkey's head, it makes a good cheap target and any shot that ventilates a can would have killed a turkey. In fact, when I started turkey hunting, the only turkey pattern targets were the ones you drew yourself, or aluminum cans. The best patterning target was an Old Style beer can, as the Old Style blue and red shield logo on side was about turkey head-sized.