It's not just the age, but the magazine that is often at fault. Back in my younger days, new to the world of handguns and 1911's, I bought a couple of very shiny, high polished stainless 1911 magazines that featured a neat, round top follower. Best of all, they were really, really cheap! Yes, I hit the jackpot! That's what I thought until I actually tried to use them. They would not reliably feed 230 grain ball ammo. The springs were weak and the magazine body metal was so soft that I could bend the feed lips with bare hands. Lesson learned, magazine quality can make or break a 1911's reliability.