springs
The spring question comes up often. A good spring supposedly does not take a "set" , what does them in is repeated flex......so they say.
I have also heard an account to WWII era mags, loaded, for 1911's, being fired and functioning just fine, nearly 50 yrs later.
There is one trainer who advises to load up your AK mags..... w/o concern, and use them all as ready storeage.
I usually download a round or twol for LONG storeage. But my duty pistol mags are all up.