Hmm.. well, I just unloaded the 9rd mags and they are doing it too. Even the newest one I just got from SA recently for the recall which has yet to have rounds cycled through it besides a couple loads and unloads. It has sat for a couple months loaded and the spring is weak already. The slide stop comes up about half way only. The slide stops on it and then I can push it up the rest of the way. With the 7's, it hangs on by a hair, if it even engages at all. I have no doubt the 9's are going to get just as bad.
I don't normally use the stop to drop the slide unless I'm just being lazy at the range. Standard procedure is an overhand yank with my weak hand. But how do I know if these springs aren't going to start causing mis-feeds? I don't, and that's scary since I'm going to start carrying this thing once I get my IL CCL later this summer. Now I'm kinda pissed.