I notice that a lot of people leave their slides locked open while their guns are stored in the case. Honestly, I feel like this would weaken the recoil spring. It's necessary to do this to use the slide lock, also, so I usually just release the slide and let it pinch the lock in the ejection port. Same deal with mags. I usually keep only 7 rounds in my 10 round mags, 27 in my 30-33 round mags, and I unload them every week to swap for different ones to let the spring relax. Is this really necessary? I don't think I'll stop doing it this way, just from my gut feeling, and I see everyone else being so lax with their springs.