While I know I can start an argument by say this, I really do not prefer RCBS or any other of the steel or copper alloy molds. I understand the argument for them but what matters to me is accuracy. I have shot NOE, Lyman, RCBS and (forgot the name of the other) and found that none of them were any more accurate in my handguns or my rifles than a Lee aluminum mold. And they are much more costly to buy.