| First off, I want to set you straight with a comment you made.
Storing your magazines full won't weaken the magazine spring. Filling and emptying them will. The only two things that will weaken any spring are excessive use (causing metal fatigue) and excessive stretching or compression. Of course corrosion will do it, but that's really not something that counts as weakening the spring, that's just destroying the metal outright.
As for what's causing the feed ramp hang-up, it might be that the magazines aren't seating deep enough in the mag-well, but I doubt it if they're engaging the mag-release. Plus, if an armorer has looked it over and found nothing wrong and you're still having problems, I'd send it back to GLOCK after emailing them with the issue and I'll bet they'll make it right.
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