We all know that ammo, just like any dry good, is probably best stored at 51.65 degrees f in a dark dry place with no vibration and oxygen absorbers. OK realistically, I'm curious to know who has stored ammo in a garage or some other freezer-turned-oven and had it shoot 20 years on. Sounds ridiculous, but I'm getting a little short on the inside for cramming a few extra rounds. The stuff I burn through by the case (i.e. 7,1/2 shot shells, #2 steel, 22 LR) stay in the shop and I've never had problems. But what about bulk rifle ammo in the can? Is it made to take the temp swings and last for a few decades?