This question and doubt was brought up back in the '50's and I was assigned by Hdqrs Mar Corps to find out if 1911 magazine springs would lose their tension if stored loaded. Not to bore you with metallurgical details and all that technical crap, but my findings were that: less than two percent of the spring strength was lost over a period of four years and this would not cause loading malfunctions. I left five in a file cabinet and if some newbie hasn't broken the lock and removed them, I'll bet they will still function. That was over forty years ago.
Welcome aboard, George!! Too much time in front of a monitor will ruin your eyesight. That's why you failed the Kentucky Eyesight Test. (private joke) Doc