I am old and still have ammo I bought 40 years ago that work fine. Got some WW2 ammo that still work great too.
I've been wondering how long you can store ammo in the right conditions .I have some stuff thats 17 or 18 years old that works just fine as well . I have heard the gun powder does degrade over time even in the best of conditions . I don't think I'll go over the 20 year mark before I recycle old for new .