HI GUYS,
in a box of dies I got there is a 3 set marked M43S, solid steel set, unused, in an old RCBS box, but are not RCBS,
tried some of my cases in and all to big, although a .310 bullet goes nicely through the crimp die,
any one have any idears on these,
did a web search ,nothing of any help,
thanks,
T,