Wet Brass and Water Damage: Assessing Compromised Ammunition Loads

Out in the field, or even just on a damp range day, you might stumble across something that looks like ammunition—brass casings, projectiles, or even a whole box of rounds. It’s a situation that immediately raises a red flag for any shooter who takes their marksmanship seriously.

The question is simple, but the answer is complex: Can compromised ammunition be safely fired? The principles of ballistics and chemistry dictate that the answer is almost always no, and the potential risk is never worth the gamble.

When we talk about reliable performance—whether you're dialing in a precision rifle for long range or just running dry fire on the AR-15—we are talking about the perfect chemical reaction. This reaction depends entirely on the integrity of the components, from the brass casing to the propellant charge.

Understanding the Ballistics of Moisture Damage

As shown in this review, moisture is the enemy of reliable ammunition. The video highlights a critical detail: the sealing ring. When ammunition is manufactured, the powder charge is designed to be hermetically sealed. This isn't just good practice; it's a necessity. Water or excessive humidity can infiltrate the powder column, causing several problems:

• Corrosion: Water accelerates the corrosion of the brass casing and the copper jacket of the projectile.
• Propellant Degradation: More critically, moisture can compromise the chemical stability of the powder. If the powder grain is wet or contaminated, the burn rate becomes unpredictable, leading to inconsistent pressures, potential hang-fires, or catastrophic failure upon ignition.
• Improper Function: Even if a round fires—as the demonstration showed—the performance will be unreliable. The pressure curve will be erratic, leading to poor grouping and a significant loss of velocity and accuracy.

The lesson here is one of discipline. The moment you find ammunition that has been exposed to the elements—wet, muddy, or otherwise compromised—it should be treated as scrap. It does not belong in your magazine, and it does not belong on the firing line.

Range Discipline and Proper Storage

The best way to avoid this headache is through obsessive range discipline and rigorous storage protocols. If you are serious about your sport, whether it’s bolt action target shooting or concealed carry with a Glock, the state of your ammo must be perfect.

The Reliability of Reloading

For those who take the time to reload their own brass and charge their own components, the control over the process is unmatched. Reloading allows you to meticulously control every variable—the type of powder, the grain weight, and the seating depth—ensuring maximum consistency and safety. This level of control is the cornerstone of advanced marksmanship.

Maintaining Your Collection

If you aren't reloading, proper storage is paramount. Ammo should be kept in climate-controlled environments, away from direct heat, extreme cold, and especially moisture. Desiccants and dry storage boxes are non-negotiable tools for any serious collector or shooter.

The commitment to competence is what separates the casual shooter from the dedicated student of ballistics. Don't let a wet pile of brass undermine your confidence or your safety.

The 2A is a responsibility, not a right to a handout. It requires knowledge, discipline, and a commitment to mechanical reliability. Treat your gear—and your ammunition—with the respect it demands.

Don't let poor storage habits dictate your performance. Take control of your process. Find a local Range Master to review your current reloading setup, list your custom build on the marketplace, or sign up for a long-range class that emphasizes fieldcraft and precision. The best shooter is the one who knows their equipment inside and out.