How to Store Ammo Long-Term So It Still Works Years From Now

Buying ammo when prices are low only pays off if that ammo still works when you need it. The good news: modern factory ammunition is remarkably durable. Stored sensibly, it can stay reliable for decades. Here is how to give it the best chance.

The enemies: moisture, heat and swings in temperature

Moisture is the biggest threat. It corrodes cases and primers and can degrade powder over time. Heat speeds up chemical breakdown, and big temperature swings cause condensation inside containers. The goal is simple: keep ammo cool, dry and stable.

Pick the right place

• Good: an interior closet or a climate-controlled room in your home.
• Risky: attics, unheated garages, sheds and vehicles, where temperatures climb and fall sharply.
• Basements: fine if they are dry; use a dehumidifier if they are not.

Use sealed containers

Military-style metal ammo cans with a rubber gasket are the classic choice for good reason. They seal out humidity, stack well and are tough. Quality polymer cans with gaskets work too. Check the gasket now and then and replace any that are cracked or flattened.

Add desiccant packs to each can to soak up any moisture that gets in. Rechargeable silica gel packs can be dried out in an oven and reused.

Label and rotate

Write the caliber, load and purchase date on each can. Shoot your oldest practice ammo first and replace it with new stock. For defensive ammo you carry daily, swap it out roughly once a year, since carry rounds see more handling, lint and temperature changes.

Keep it organized and secure

Store ammo away from solvents and cleaning chemicals, which can get into primers. Keep it out of reach of children and unauthorized people, and follow your state and local laws on storage. Many people store ammo separately from firearms for an extra layer of safety.

A note on buying for storage

Ammo that comes in a sealed can, like some bulk packs and battle packs, is ready for long-term storage out of the box. Keep an eye on our daily ammo deals; packs that include an ammo can are often a better value than they first appear.