Long-Term Ammunition Storage: How to Protect Your Investment

Ammunition is a crucial investment for any firearm owner. If you’re buying in bulk, preparing for emergencies, or stocking up for hunting, properly storing your ammo for the long term is essential. Poor storage can lead to moisture damage, corrosion, or even dangerous malfunctions, potentially ruining your stockpile and putting you at risk.

In this guide, we’ll explore long-term ammunition storage solutions that will help you protect your stock and keep it in top condition for years. From maintaining the right environment to using proper containers and moisture control, these best practices will ensure your ammunition remains safe, functional, and ready to use.

For additional tips on safe storage, check out our complete guide on how to safely store ammunition.

Why Long-Term Storage Matters

Ammunition is built to last, but its performance and safety can deteriorate over time if stored improperly. Factors like humidity, fluctuating temperatures, and environmental exposure can cause issues such as corrosion and gunpowder degradation. This is why long-term storage practices are different from general or short-term solutions.

Proper long-term storage is about maintaining the reliability of your ammunition over years, not just months. Whether you store it for hunting, self-defense, gun range practice, or preparedness, ensuring a secure, stable environment is key to preserving your investment.

1. Choose the Right Storage Environment

Cool, Dry, and Dark Storage Spaces

The storage environment is the single most important factor for long-term ammunition preservation. A cool, dry, and dark space is ideal, as exposure to heat, moisture, and light can damage the casings, primers, and gunpowder.

• Temperature: Keep the storage area between 55°F and 85°F for optimal conditions. Avoid places like garages, basements, or attics where temperature fluctuations are common.
• Humidity: Humidity is one of the biggest threats to ammo longevity. Consider using a dehumidifier for larger spaces, or silica gel packs in smaller containers to absorb moisture.

In environments prone to humidity, consider installing moisture control devices. For even more protection, store your ammo in a fireproof safe. Check out our guide to learn more about fireproof vs. non-fireproof gun safes.

2. Use Proper Ammunition Containers for Long-Term Storage

The right storage containers are essential for protecting ammunition from environmental factors. Not all containers provide the same level of protection, so it’s important to choose wisely.

Ammo Cans: The Gold Standard

Metal ammo cans are one of the best options for long-term ammunition storage. Their rubber gaskets create an airtight seal that prevents moisture, dust, and debris from entering. Additionally, metal cans are incredibly durable and can withstand harsh conditions.

• Airtight Seal: The airtight seal on these cans helps maintain the integrity of the ammunition, especially when used in conjunction with moisture control tools.
• Durability: Metal cans are sturdy, reliable, and ideal for both short-term and long-term storage.

If you’re unsure which caliber is best for your specific needs, check out our detailed guide on gun calibers for hunting, defense, and sport to make an informed decision.

Plastic Storage Containers

Plastic containers, while lighter and easier to handle, can also be effective for long-term storage if they are airtight. Some high-quality plastic containers feature moisture-resistant seals that can protect against environmental hazards.

• Lightweight and Portable: Plastic containers are a good alternative if you need something portable or affordable. Just ensure that they are durable and feature an airtight seal.

To further protect your ammunition storage, you can enhance your storage solutions with accessories like dehumidifiers, lighting, and alarms. Explore our top 10 gun safe accessories to enhance your security setup.

3. Moisture Control: The Key to Long-Term Preservation

Silica Gel Packs and Desiccants

Moisture is one of the biggest threats to ammunition longevity. To protect against this, silica gel packs or desiccants are essential. They absorb moisture in the air and help create a dry environment inside your storage containers.

• How to Use: Place silica gel packs inside each ammo can or plastic container. Check and replace them regularly, especially if you live in a humid climate.

Dehumidifiers for Larger Storage Areas

For larger storage areas, such as safes or entire storage rooms, an electric dehumidifier may be necessary. These devices help regulate the humidity in the room and prevent moisture from accumulating on your ammunition.

If you’re storing ammunition in a safe, ensure you’re also maintaining the safe itself. This can significantly extend its lifespan and the protection it offers. Learn more in our guide on maintaining your gun safe for longevity.

Ammunition Storage Dos and Don’ts Chart

To help you remember the key points, here’s a quick-reference chart:

Category	Do’s	Don’ts
Storage Environment	-Store in cool, dry, and dark places	-Don’t store in attics, basements, or garages
	-Maintain temperate between 55F and 85F	-Avoid exposure to direct sunlight or heat sources
Containers	-Use metal ammo cans with airtight seals	-Don’t store ammo in loose, open containers
	-Use silica gel packs or desiccants inside containers	-Avoid using cardboard or flimsy packaging long-term
	-For plastic containers, ensure they are airtight
Moisture Control	-Use dehumidifiers for large spaces	-Don’t ignore humidity in storage areas
	-Replace desiccants periodically	-Don’t store ammo near water sources or humid areas
Rotation & Inspection	-Rotate stock, use oldest rounds first	-Don’t neglect inspecting ammo regularly for damage
	-Label containers with caliber and date of purchase	-Don’t use damaged or corroded ammunition
Legal	Research local/state laws on ammo storage laws	-Don’t exceed fire code limits without safety measures
	-Store in a fireproof safe if storing large quantities	-Don’t store ammo near flammable materials

4. Inspecting and Rotating Stock for Long-Term Storage

Inspect Regularly for Damage

Even well-stored ammunition needs to be inspected periodically. Look for signs of corrosion, rust, or any other damage. Damaged rounds can be dangerous to use and should be discarded.

• What to Look For: Corrosion on the casings, dents, or any signs of rust. If you find damaged rounds, safely dispose of them following local regulations.

Rotate Your Stock

To prevent ammunition from sitting unused for too long, it’s important to rotate your stock. Use the oldest rounds first, ensuring that nothing gets too old or compromised.

• Label Your Ammo: Label your ammo containers with the caliber, purchase date, and quantity. This makes it easy to track and rotate your stock.

For more detailed information on selecting and organizing gun safes for ammo, you can read our guide on choosing the right gun safe for your car or truck.

5. Legal Considerations for Long-Term Ammunition Storage

Know Local Laws on Ammo Storage

In some regions, there are restrictions on how much ammunition you can store and how it must be stored. Be sure to research local, state, and federal regulations to ensure compliance.

• Fire Code Regulations: Many fire codes limit the amount of ammunition you can store without additional safety measures, such as fireproof safes or secure cabinets. For those with large stockpiles, it’s a good idea to invest in a fireproof safe to meet regulations and protect your ammo.

If you’re storing a large quantity of ammo, a fireproof safe is a must. Learn more about fireproof vs. non-fireproof gun safes.

Conclusion

Long-term ammunition storage requires careful planning and attention to detail. From selecting the right storage containers to maintaining a cool, dry environment, each step ensures that your ammunition stays in top condition.

By following these best practices—such as using metal ammo cans, controlling moisture with silica gel packs, and regularly inspecting your stock—you can store ammunition for years without worrying about degradation. Remember to stay up-to-date with local laws and regulations to keep your storage setup compliant and secure.

If you’re looking to further secure your ammunition and firearms, check out our complete guide to the best gun safes.

FAQ: Long-Term Ammunition Storage Solutions

1. How long can ammunition be stored safely?
Ammunition can be stored safely for decades if it’s kept in a cool, dry, and dark environment with minimal exposure to moisture. Using airtight containers and silica gel packs to control humidity will help preserve its longevity. Regular inspections are also important to ensure no damage has occurred over time.

2. Should I store ammunition in my gun safe?
Yes, many gun safes have dedicated compartments for ammunition, which help keep it secure and protected from environmental factors. For large quantities of ammunition or long-term storage, consider using a fireproof safe to safeguard against fire hazards. You can learn more about choosing the right storage options in our guide to fireproof gun safes.

3. How can I prevent moisture damage in my ammo storage?
To prevent moisture damage, always store ammunition in airtight containers, such as metal ammo cans or high-quality plastic storage boxes. Adding silica gel packs or other desiccants to absorb moisture will further protect your rounds. In larger storage spaces, a dehumidifier can help regulate the environment.

4. Is it safe to store ammunition in the garage or attic?
Garages and attics are not ideal locations for long-term ammunition storage because of the extreme temperature fluctuations and potential exposure to humidity. A cool, dry, and dark place inside your home, such as a closet or a dedicated safe, is a better option.

5. Should I rotate my ammunition stock?
Yes, rotating your ammunition stock is a good practice, especially if you have a large amount stored. Use the oldest ammunition first and label each container with the purchase date to keep track. Regularly inspect your ammunition for any signs of damage or corrosion.

6. What are the best containers for long-term ammo storage?
Metal ammo cans with airtight seals are the best option for long-term ammunition storage. These containers offer superior protection against moisture and physical damage. High-quality plastic storage containers with airtight seals can also be effective, though they may not offer the same level of durability as metal cans.

7. Can I store reloading supplies and black powder with regular ammunition?
It’s best to store reloading supplies and black powder separately from regular ammunition, as they are more sensitive to environmental factors. Black powder, in particular, should be stored in its original container or a dedicated storage solution designed for volatile materials. Keep these supplies in cool, dry conditions, away from heat sources and moisture.

8. What’s the best way to dispose of damaged ammunition?
Damaged ammunition should not be used, as it could malfunction and cause accidents. To dispose of it safely, contact your local shooting range, law enforcement agency, or waste disposal service. They often have specific guidelines or facilities for safe ammunition disposal.

9. Are there legal limits on how much ammunition I can store?
In some areas, there are legal restrictions on the amount of ammunition you can store, especially regarding fire code regulations. Be sure to check local, state, and federal laws to ensure you’re complying with storage limits. If you’re storing large quantities of ammunition, a fireproof safe may be required by law. Learn more about the benefits of fireproof safes in our fireproof vs. non-fireproof gun safes guide.