One of the most popular methods of caching underground is using military surplus ammo containers. On this page, I’ll be talking about the “old-school” Vietnam-era 5.56mm, 30 caliber, 50 caliber and 20mm ammunition canisters made out of steel. They are rectangular shaped, constructed as a one-piece box with a hinged, removable top with a locking clasp and a handle.
There is one very good reason why these steel ammo cans are popular with survivalists and preppers; and that’s quite simply because they work. They have a rubber seal around the lid and provided that you don’t get one with a bad seal, it won’t leak … ever. For what it’s worth, I’ve messed with dozens of these things over the years and I’ve never even seen one with a bad seal. I always instruct people to check this gasket when purchasing a military surplus ammo can; but even if you buy one with a bad seal, all you would need to do is run a bead of all-purpose silicone over the cracked or dry-rotted seal before closing it. The only time I’ve ever told someone to scrap one was because it was dented so badly that the box itself was deformed. Ensure that the lid closes properly and you’re “good-to-go.”
Another big plus is the ease of opening and closing, you don’t need tools to open or close them. Just pop the clasp and poof! you’re done, no screwdrivers or grease. Another added benefit is that they are already camouflaged, almost always painted in the traditional olive-drab matte green that is truly difficult to spot in the brush. The paint is tough and although they will eventually rust, you can take comfort in the fact that military-grade ammo cans take a very, very long time to rust all the way through.
Read more at http://www.howtoburyyourstuff.com