Stubblejumper is right the belt is cosmetic. The only instance when the belt is used is when it comes to the H&H magnums. The case is headspaced off the belt and not the shoulder due to the cases shallow shoulder. All other belted magnums are headspaced of the shoulder not the belt. I have never read full sizing die instructions which state how to full size, so head spacing is executed off the belt. When someone states the belt is a negative factor when it comes to accuracy, they are uninformed or trying to sell you something. Good luck.