A few things to remember when preparing for storage:
- LOW Humidity: If you are storing open ammo then there is little problem. But if you are storing it in it's cardboard box inside a metal ammo box, then you need to have the cardboard box sit next to a dehumidifier for awhile.
- Temperature: This shouldn't be a problem unless you are planning to keep it in the oven, most ammo will survive a wide range of temperatures from -65 F to 122F. That's not to say that Ammo doesn't have an optimal temp range, but for storage most anywhere dry will be ok.
- Rotation: Date the boxes when you put them in storage and rotate them so you are always using the oldest first. Dating the box will also help remind you of how often you need to purchase to keep your stock levels at a comfortable point.
- Inspection: Check your stock every 12-24 months, just a spot check will do. Random boxes checked for the proper humidity levels and look for any type of corrosion or rust.
- Clean: Make sure the ammo is clean and wiped off if you touch it before you close up the box.
One final point I'd like to bring up about Ammunition storage. Keep it locked up and safe from the kids or other unfavorables who would like to relieve you of having to keep it. As always with your firearms, safety is point number one.
Front Towards Enemy, We the Armed: Ammo thread