Years ago I read about 1911 mags still loaded from WWII and they all fed fine. I believe it is constant load and unload that screws with the springs.Do you guys rotate the mag? I think I remember reading somewhere that a guy didn’t keep his shotgun tubes loaded full to reduce the spring wearing out from being compressed for years. It makes me wonder if you keep the same mag fully loaded in your carry the spring is under pressure for its entire life and could possibly weaken causing a failure to load.