Can You Keep Ammo in a Hot Car? The Risks and Recommendations
Leaving ammunition in a hot car is a risky proposition, and the answer is a resounding generally, no. While the ammunition itself might not explode, the extreme heat can significantly degrade its performance and potentially create dangerous situations. This article delves into the specifics of why you shouldn't store ammo in high temperatures and offers safer alternatives.
The Dangers of Heat on Ammunition
Exposure to excessive heat can lead to several detrimental effects on ammunition:
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Degraded Propellant: The propellant in cartridges is sensitive to temperature fluctuations. Extreme heat can cause the propellant to decompose, becoming less stable and potentially less effective. This can result in reduced velocity, inconsistent ignition, or even complete failure to fire. This is a serious safety concern, especially for self-defense situations where reliable performance is critical.
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Case Swelling or Rupture: The metal casings of ammunition can expand under high temperatures. This expansion might be slight and unremarkable, but in extreme heat, casings could swell significantly, potentially causing them to rupture or become difficult to chamber in a firearm. A ruptured casing can create a dangerous situation for the shooter.
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Primer Degradation: The primers, responsible for igniting the propellant, are also susceptible to heat damage. High temperatures can weaken or compromise the primer's ability to ignite the powder reliably. This again increases the chance of a misfire or malfunction.
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Increased Risk of Accidental Discharge: While unlikely, extreme heat can potentially stress the components of a cartridge to the point of accidental discharge. This is a low-probability event, but it underscores the inherent risk of leaving ammunition in a hot car.
What Temperatures are Too High?
There's no single magic number, but temperatures consistently above 100°F (38°C) begin to pose a significant risk to ammunition. Interior car temperatures can easily exceed this threshold on a hot summer day, especially if the car is parked in direct sunlight. The longer the ammunition is exposed to these high temperatures, the greater the risk of damage.
Safer Alternatives for Storing Ammunition
Proper storage of ammunition is crucial for both safety and performance. Here are some recommendations:
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Cool, Dry Place: Store your ammunition in a cool, dry, and well-ventilated area away from direct sunlight. A locked gun safe or cabinet is ideal.
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Temperature Control: Maintaining a consistent temperature is vital. Avoid locations prone to extreme temperature swings.
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Moisture Control: Humidity can also affect ammunition. Use desiccants if necessary to maintain low humidity levels.
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Separate Storage: Store ammunition separately from firearms.
Conclusion
While the immediate risk of ammunition exploding in a hot car is relatively low, the potential for performance degradation and increased safety hazards is real. The risks far outweigh any convenience gained by leaving ammunition in a hot vehicle. Prioritize safe storage practices to maintain the reliability and safety of your ammunition. Remember, responsible gun ownership includes responsible ammunition storage.
