rcbs dies

Dies 300 WBY Mag FL - $40 30-30 WCF - $40 NEW 30-378 WBY Mag FL - $45 NEW 30-378 WBY Mag FL -$40 300 SAV FL - SOLD 270 WBY Mag Neck - SOLD 7 MAG FL & Precision Mic -$80 41 Mag - $25 38 spl - $40 44 mag - $40 $400 for all shipped Prices are shipped, first I'll take it by time stamp gets it, pp...

Just wondering what everybody uses to keep their dies rust free. My reloading setup is in the house so no wild temp shifts. I currently use a paper type “rust preventative”. I cut it roughly the size of the die box and lay it over the dies and close it up. Seems to do ok but the paper has been...