I've also used the RCBS case slick spray since I started reloading. Just yesterday, however, after listening to all the hype here and on other forums about "mixing your own," I mixed up a 10:1 mixture of Heet:Lee lube to try. Took only 5 cases resizing FC 223 brass to switch back...much more force needed than with the RCBS case slick. So I don't know about Imperial Sizing wax, but I'm a definite "no" on switching to the lanolin/alcohol mixtures. And I've read enough horror stories about sticking the occasional case with One Shot not to attempt that (even though the MDS shows it's similar to RCBS!??).