Does Reloaded Ammo Have a Shelf Life?

In his book "Handloading for Competition, Zeideker mentions that the oil from fingers handling projectiles before seating can cause corrosion at the projectile-neck interface inside the case. He has seen this effect after as little as 2 years. To counter this, he suggests wearing gloves to handle projectiles before seating for any ammo that may be expected to be stored for any length of time. I wear thin painter's gloves when I handle my cleaned brass and projectiles and it keeps finger marks off the brass and projectiles.
 
I had a half case of very good match ammo left over after a big competition in England. I could not take it home, so I hid it in an unheated building. Next year the ammo was terrible.

I don't know what happened, but cold weather seemed to hurt it.

I store powder outside in s bunker, but not ammo.
 
Here is a thought for storing ammo for a extended period of time. I have not tried this as yet but some of us hunters have vacuum sealers for processing and freezing the game we bring home. Why wouldn't this work for ammo and other objects that rust or tarnish easily. If you wanted to leave a stash of ammo at a cabin or favorite hunting location this may work. I know when I reload it isn't just 20 rounds or so. I usually load up everything I have on hand for a certain caliber and store it in ammo cans. Vacuum sealing 50-100 rounds at a time should give some extra shelf life. This could work for the "DOOMSDAY" preppers too.
 
If I was planning on storing ammo for an extended period I might prepare/package it differently, and find a stable place to tuck it in. Lacquer around primer n' ball, or something like it. I know lubing ammo for firing is usually a no-no, but it would certainly help preserve something for a long duration.
 
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