I get what you are saying Joe, My first sentence was about extended storage.. not a year or two. The conversation began about:
I certainly hope that more than a year or two... Long term! And yes i do a lot of extra work on my reloads. I have spent literally weeks breaking down ammo that had gotten wet in a flood. It was 30-06 ball that was stored in a GI ammo can. But got caught a week underwater. The primers and powders both failed. So i unloaded each round and reused the brass and bullet with new powder and primers. Yes i took the time to paint the seals. This was 1500 rounds that were given to me by the guy that originality reloaded them.
EDIT: Was it worth it?... Not! Way too much effort went into that project. No i wouldn't attempt it again.. My time was worth more than the ammo. But i learned!
Edit #2: I forgot to mention: I received the ammo as 30-06, i trimmed the cases and re-necked it all to .308 for my M-1A. Then let everyone else shoot it all..