BBob
WKR
No expander balls, I haven't used one of those for well over 30 years. Carbide mandrels or pin gauges in a custom die. I've tried all sorts of lube inside of necks. Nothing stood out better than a plain old carbon coated neck sized with a bushing only. In some instances I felt lube created inconsistencies. I used to do anything and everything that in theory might be better but I've been on a quest to do as little as possible and so far most things aren't worth doing at least for me anyway.I can see why you wouldn't need any lube inside the neck if you're not expanding it at all but you're saying you didn't when you did expand? With an expander ball? I know some guys use carbide mandrels that need less lube.