I'm processing a bunch of .223 brass for my ar15. My forster fl sizing die is setup on my coax to bump back the shoulder .004" for my ar15. After working out some issues with improper lube application I'm finally rocking and rolling. However, sometimes I'll have a piece of brass that just won't bump back no matter what I do. I vary the lube, clean the die, do a rain dance, but no luck. Some cases just refuse to bump back any bit. I've tried changing lubes from Imperial to the dillion case lube and am now stuck wondering why the odd case here and there refuses to bump back. Anyone else seen this issue?
