My RCBS hand primer (90200) gets cranky sometimes...…the handle gets hard to squeeze, it develops little clicks and rough spots in the pull, etc. Last night....I tired of fighting with it, so I took it completely apart, cleaned all the internal parts and gave everything a very light rub down with Imperial. Put it all back together, and holy cow! I'm guessing it takes half the effort to seat a primer now!! I've only fed 200 through it since, but thought I'd share, as for me it took a good tool to an even better place. I'm hoping the Imperial will stay put and hold up for a while......time will tell.
Trails.