Hopefully not too stupid of a question, but is it okay to keep a few loaded magazines just laying out on my bed headboard thing for emergencies? They are exposed to whatever conditions my bedroom may present (air through an open window etc), so I am wondering how long the ammo loaded in them will last (M855). M855 is supposed to have sealed bullets and primers, right?
I would doubt that the ammo would be affected much at all. Even without sealed primers/bullets, mild humidity from an open window wouldn’t spoil ammo that soon, would it?