well, wildcatting the .223 would probably be cheaper than those alternatives if youre using a .223/5.56mm based wildcat, then all youd need is a barrel change, and 223 brass is not expensive at all, so with the reloading dies you could make wildcats fairly cheap, i just dont see the 6mmx45 having any benefit over the standard .223, but im sure there are other options for a wildcat besides that
|