I run all 40 through a Bulge Buster. I never get the pimple of the actual Glock problem but rather a general bulge too close to the case head for the dies to otherwise affect. I concluded that this was caused by the case ejecting while still under pressure, i.e the nature of the beast, not designed to support reloadng. My problem was mostly Kahr rather than Glock. Kahr chambers in my guns are unforgiving, so I just use a cartridge gauge. It's just easier to precondition everything and load to standard dimensions.