I also use Imperial Sizing Wax when full length resizing. It is a little slower and time consuming to use than some lubes but is very effecient and clean to use. I' ve never had a stuck case using it. I also use ground mica to lube the inside of the case necks. The combination of the two makes for smooth and effortless full length sizing. As far as the dents in the shoulders, that is just a trial and error thing that you will get better at with experience. With just the right amount of lube, you will get smooth operation and dent free shoulders on your cases. Too much lube and there' s those ugly dents![:@]