I found out many years ago that if a pistol magazine is loaded for a long period of time that the spring would become weak and cause jamming after the first three or four rounds are fired. I was wondering if anyone knows if law enforcement agencies rotate their magazines and how often to prevent this type of jamming. I have at least four factory mags for each of my carry pistols and I keep only two loaded at one time and try to rotate them with two other mags about every few weeks or so. I don't know if my practice is often enough but since I've been practicing this method I haven't had any problems with my mags causing jams.
Thanks.