I'm using some H110 in my .458 socom and my 300BLK that was manufactured in 1963 and stored in a basement. The guy who gave it to me (20lbs) bought it when he was in his 20s. It's in paper bags (from the factory) and has been shooting fine, I've been through a couple pounds.
I recently shot some .50 BMG ammo that was date stamped 1957 and it fired just fine. Like others have said, I don't think you need to be concerned within your life span.
I remember shooting ammo in the millitary that was older than i was. I currently have ammo from the 70's that does just fine. Check millitary specs. I would be more concerned about shooting new ammo in a very old gun.
When I got into pistol reloading about two months ago I found a can of 231 that I had had for 20 years or more. Stored in my garage with the lid screwed on tight. All reloaded 9mm and .45 rounds fired without issue. I've never had primers that long - but feel certain they's last beyond your life expectancy