Magazine Maintenance - It's ALL the Rage!!
Rifle or pistol; doesn't matter. This is THE best time to start your mag cleaning tasks. Everyone you clean today will have a performance buffer built in. Don't forget to check for bent feed lips, spring exhaustion, and cracks in the follower.
I do about a half dozen every day, if I have nothing else going. Even the loaded mags - dump the ammo, clean the mag, change the mag out to one that's not been loaded, and put it back where you got it.
You won't regret it.
An aside: Putting 30 rounds in a standard AR mag and storing it does NOT cause the spring to weaken. Metallurgy will tell us that over-compression of the spring (like putting 31 rounds in it and leaving it, will cause the spring to become exhausted.
I've kept my 'stand-by's' loaded for a year at a time, minimum, and randomly take one to the range; fire it, with absolutely no failures to feed.