I have a Redding 7x57 FL die that isn't responding to any fixes.
Using neck-sorted, once-fired Remington brass, the die itself sizes the brass very straight, so it's clearly the expander that's the problem.
Expanding as a separate step doesn't work, either with the die tight or loose in the press. In line with the advice on the case lube thread, I tried brushing the case necks with either RCBS case lube or Imperial sizing die wax, but neither seems to make a difference.
I've spun the decapping rod in my Casemaster and tried bending it slightly, but it looks as if the ball itself isn't concentric with the rod. With the working end of the Casemaster touching the top edge of the expander ball, I see about .003" runout. Is that likely to be the problem?
