We all use powder measures. Most of the older Lyman and RCBS measures utilize a rotary drum to measure charge powder. Often the charge gets dumped directly into a primed cartridge case. Sometimes the measured charge goes into a scale pan to trickle a few more gains to produce a precise rifle charge down to a tenth of a grain. For those who own a precision electronic scale, the manual trickling of a 1/4 grain of powder is of no concern. My old rotary measures get difficult to rotate. Oil messes them up making things worse. Discovered spray graphite! I use ZEP Spray Graphite on my boolit moulds to keep the sprue plates gliding over the mould tops. Oil just does not work! My Magma Master Caster loves the ZEP Spray Graphite. The semi-auto Magma really turns out the boolits!! The spray graphite works great on the rotary powder measures. My RCBS and Lyman measures all have a black stain on them. But the graphite is carried by a thin liquid carrier as it is sprayed. The carrier evaporates and leaves the very fine graphite. No more difficult to turn rotary measures. I even have used the spray graphite on my Dillon presses as they have slide bar measurers. Just one little trick I have stumbled on! Maybe this little remedy will help a fellow boolit caster!!!