In the single stage press I use carbide dies and don't lube them, however, I find that lubing your pistol cases with Hornady One Shot and running them through your progressive make the operation as smooth as glass. I reload all my large volume stuff on a Dillon 650. It's true that with carbide you need not lube, but after cranking out several hundred 40 S&W once fired brass, I've found that a little case lube makes all the difference. The good thing about one shot is that you need not remove it. The Dillon lube on the other hand must be cleaned off, usually a short stint in the case tumbler will remove the case lube. 15 mins or so. I also only tumble ammo with jacketed or plated bullets as the moly coating turns the corn cob I use, black.