M4arc: What does FTE's have to do with this? Basically once I stripped the top cartridge, the next cartridge does not pop up w/o significant slapping of the mag. If I had been using these mags at the range, I'd probably experience a failure to feed and probably spent half the time there wondering if I was limp wristing or doing something wrong.
I keep all of my AR, AK, and P90 mags fully loaded (30/30/50 respectively) and do not have a problem unloading all of the cartridges - they feed like butter. Obviously using only polished brass cased ammo is one possible solution since there's less friction. However, what happens to "Glock Perfection" when there's gunk inside the mag or if the cases are rough? I bought the Glock for its reliability and ability to shoot almost any type of new commercially loaded ammo.
If I have to keep these 33rd mags unloaded or only partially loaded, there's still no guarantee that they won't jam in the field. It seems to me that the 33rd mags need stronger springs because of the +2 baseplates.
1IV: you are right though, the 33rd mags seem to work fine if I load them up to around 15-20 rounds. Anything more, and it's hard to load the mag and jams frequently when unloading.