How Long Does Ammo Last? Shelf Life of Bullets Explained

How Long Does Ammunition Last? Understanding Shelf Life

Ammunition is a critical component for shooters, hunters, and tactical professionals. One of the most common questions is, “How long does ammunition last?” The answer depends on several factors, including storage conditions, the type of ammunition, and environmental exposure. When properly stored ammunition can remain reliable for decades.

Factors Affecting the Shelf Life of Ammunition

Several factors influence how long ammunition lasts. Understanding these can help you maximize the lifespan of your bullets:

• Humidity: Moisture is the enemy of ammunition. High humidity can cause corrosion on casings and primers, leading to misfires or degraded performance.
• Temperature: Extreme heat or cold can degrade the chemical components of ammunition over time. Consistent, moderate temperatures are ideal.
• Exposure to Corrosive Elements: Salt, chemicals, or other corrosive substances can damage casings and primers.
• Type of Ammunition: Brass-cased rounds typically last longer than steel-cased rounds due to their resistance to corrosion.

Proper Storage Tips for Longevity

To ensure your ammunition lasts as long as possible, follow these storage tips:

1. Use Airtight Containers: Store ammo in airtight containers with desiccant packs to keep moisture out.
2. Avoid Temperature Fluctuations: Keep ammunition in a climate-controlled environment, such as a closet or gun safe.
3. Keep Away from Sunlight: Prolonged exposure to UV rays can degrade the powder and primers.
4. Label and Rotate Stock: Use older ammunition first and label containers with purchase dates to track shelf life.

Check Out Apex Ordnance’s 5.56 NATO Ammunition

At Apex Ordnance, we specialize in high-quality 5.56 NATO and .223 Remington ammunition. Our veteran-owned business is committed to providing reliable, precision-engineered rounds for every shooting need.

How to Identify Bad Ammunition

Even with proper storage, ammunition can degrade over time. Here’s how to identify if your ammo has gone bad:

• Corrosion: Look for green or white powdery residue on casings.
• Discoloration: Tarnished or discolored casings may indicate moisture damage.
• Dents or Deformities: Damaged casings can cause feeding issues or misfires.
• Foul Odor: A strong, acrid smell may indicate degraded powder.

If you notice any of these signs, it’s best to dispose of the ammunition safely or consult a professional.

Shelf Life of Different Types of Ammunition

Not all ammunition is created equal. Here’s a breakdown of how long different types of ammo typically last:

Why Brass-Cased Ammo Lasts Longer

Brass is naturally resistant to corrosion, making it ideal for long-term storage. Additionally, most brass-cased rounds have sealed primers, which further protect against moisture.

Common Myths About Ammunition Shelf Life

There are many misconceptions about how long ammunition lasts. Let’s debunk a few:

1. Myth: Ammo expires after a few years.
   Fact: Properly stored ammo can last decades without losing performance.

2. Myth: Reloaded ammo doesn’t last as long as factory ammo.
   Fact: Reloaded ammo can last just as long if stored correctly and made with quality components.

3. Myth: Freezing temperatures ruin ammunition.
   Fact: While extreme cold isn’t ideal, it won’t immediately ruin ammo. Consistent temperature is more important.

Practical Tips for Extending Ammo Shelf Life

Here are some actionable tips to ensure your ammunition remains reliable for years to come:

• Invest in a Gun Safe: A climate-controlled gun safe is ideal for storing both firearms and ammunition.
• Use Ammo Cans: Military-grade ammo cans with rubber seals provide excellent protection against moisture.
• Rotate Your Stock: Use older ammunition first to ensure nothing sits unused for too long.
• Inspect Regularly: Check your stored ammo periodically for signs of corrosion or damage.

For More Tips, check out our Ammunition Storage Guide.

How Long is Ammunition Good For: Frequently Asked Questions

• How long does ammo last under proper storage conditions?

  Ammunition can last decades when stored in a cool, dry place away from moisture and extreme temperatures. Properly stored ammo can remain reliable for 20-30 years or more.

• What factors affect the shelf life of ammunition?

  Humidity, temperature fluctuations, and exposure to corrosive elements can significantly reduce the shelf life of ammunition. Proper storage is key to maintaining its longevity.

• Can old ammunition still be fired safely?

  If stored correctly, old ammunition can still be fired safely. However, inspect for signs of corrosion, discoloration, or damage before use.

• How does humidity impact the shelf life of bullets?

  High humidity can cause corrosion on casings and primers, leading to misfires or degraded performance. Store ammo in airtight containers with desiccants to prevent moisture damage.

• What is the best way to store ammunition for long-term use?

  Store ammunition in a cool, dry place, ideally in airtight containers with desiccant packs. Avoid basements or attics where temperature and humidity fluctuate.

• Does the type of ammunition affect its shelf life?

  Yes, some types of ammunition, like steel-cased rounds, may corrode faster than brass-cased rounds. Proper storage is critical for all types.

• How can I tell if my ammunition has gone bad?

  Look for signs of corrosion, green or white powdery residue, or dents in the casing. If in doubt, consult a professional before firing.

• Can reloaded ammunition last as long as factory ammo?

  Reloaded ammunition can last as long as factory ammo if stored properly. However, the quality of components and reloading techniques play a significant role.

• What is the shelf life of 5.56 NATO ammunition?

  5.56 NATO ammunition, when stored correctly, can last 20-30 years or more. Its brass casing and sealed primers contribute to its longevity.

• Does temperature affect the shelf life of ammunition?

  Extreme temperatures can degrade ammunition over time. Avoid storing ammo in places like car trunks or garages where temperatures fluctuate widely.