Originally Posted by Oregon45
Any reports on leaving factory Glock magazines loaded for long periods of time? Do they eventually have feed-lip spreading problems like some all polymer AR-15 magazines, or do the metal feed lips of the Glock factory magazines prevent this?
Not me. I've been carrying a Glock 17 for nearly two years now, and I keep several loaded all the time (fully topped off), only occasionally emptying them by shooting them out at the range. All work great.

I asked my nephew about this (he's a Phoenix cop), and he says this is standard procedure (they all carry Glock 22s and 23s), and he's never heard of a problem either.