If you’ve got ammunition stored away, you might wonder, “How long is ammo good for?” While ammo doesn’t come with an expiration date, like most things (maybe excluding Twinkies, or so we hear), it can get old and this can affect its reliability. Its longevity depends on how it’s stored and the environment it’s kept in. Ammunition can last decades, but it’s important to understand the factors that impact its shelf life. Join Maui Ammo and Gun Supply and let’s dive into the details.

How Long is Ammo Good For and How Long Does Ammo Last?

Ammunition can last a long time—many decades, in fact—if it’s stored properly. Some people have reported shooting ammo that’s over 50 years old without any issues. Generally speaking, modern ammunition is designed to be durable and resistant to environmental factors, but the way you store it will play a huge role in how long it remains reliable.

Factors That Affect Ammo Longevity

There are several key factors that affect how long your ammo will last; the biggest factor influencing how long is ammo good for is how it’s stored. For ammo to have an extended shelf life, it needs to be kept in a cool, dry environment. Moisture is the enemy of ammunition—if your ammo gets wet or is stored in a humid environment, the casing can corrode, and the powder inside can deteriorate. A cool and dry storage space, like a closet or gun safe with a dehumidifier, is ideal. This is especially important in locations like Hawaii–somewhere beautiful to live but with a lot of humidity and heat.

Signs Your Ammo Has Gone Bad

While properly stored ammo can last for decades, it’s important to periodically check your stock for any signs that it may no longer be safe to use. Here are some indicators that your ammo might have gone bad:

  • Corrosion on the Casing: If the casing is tarnished or has visible rust, the ammo may no longer be safe to shoot.
  • Dented or Damaged Rounds: Physical damage to the bullet or casing can affect how the round functions.
  • Misfires or Fizzles: If the ammo doesn’t fire properly or has a delayed ignition, this is a sign that the powder or primer has deteriorated.

Storing Ammo for Long-Term Use

If you’re looking to store ammo for long periods, follow these simple tips to maximize its shelf life:

  • Store in a Cool, Dry Place: The less exposure to heat and humidity, the longer your ammo will last.
  • Use Airtight Containers: Ammo cans or plastic bins with rubber seals will protect your rounds from environmental factors like moisture.
  • Add Silica Gel Packs: These help absorb moisture, keeping your ammo dry and in good condition.

Learn More about Ammo Longevity

So, how long is ammo good for? With the right storage conditions—cool, dry, and stable—it can last for decades, sometimes even up to 50 years or more. However, poorly stored ammo exposed to moisture or extreme temperatures can degrade much faster. If you take care of your ammunition, it will be there for you when you need it.

For more detailed guidelines on ammunition storage, check out reputable resources or consult your local gun experts. It’s always better to store your ammo properly to ensure safety and reliability.

Have more questions about guns or ammo? Make sure to reach out to Maui Ammo and Gun Supply today!