I played at a scenario at the beginning of this month and got to use the zetamags and had no issues with loading or operation. Could've been a bad batch of mags/springs IMO.
Moon Shadow G3 Spec-R w/ G4 Reg & Bob Long Cam Drive ASA
Black Dye I4 w/ Blue Ice Lens
Dye I4 w/ Clear Lens/Blue Ice Lens
Blood Clots, Sweat Dries, Bones Heal... Suck it up Princess