Dip the case neck in fine graphite, don't worry about what you can't see after.I tried dipping in fine graphite but the neck is so dry that the powder doesn't stick.
If the powder is visibly sticking to the neck, it's not right, maybe the case is dirty or still has lube on it.
You should feel the difference using the mandrel with cases dipped in graphite, and not, even if you can't see the graphite.









