Why Do Shotgun Shells Swell
Shotgun shells swell when the brass base expands due to corrosion. This is commonly referred to as “fat brass” in the field.
Exposure to moisture, mud, and humidity creates buildup on the brass. Over time, this corrosion causes the brass to expand slightly, changing the outer dimensions of the shell.
What Is “Fat Brass”
“Fat brass” is a term used by hunters to describe shells that have swollen and no longer fit properly in the chamber.
When the brass expands, it can create resistance during feeding, prevent smooth chambering, and cause extraction issues after firing.
What Happens When Shells Swell
When shotgun shells swell, they can:
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Fail to chamber properly
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Feed inconsistently
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Get stuck in the chamber
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Cause extraction problems after firing
These are mechanical issues caused by the condition of the brass—not the primer or powder.
Why This Happens More in Hunting Conditions
Shotgun shells are often exposed to wet environments such as rain, marsh water, and humidity. Shells stored in waders, blinds, or gear bags can retain moisture, accelerating corrosion over time.
Swelling happens gradually, so many hunters don’t notice it until shells begin to stick or fail to chamber. By that point, multiple shells may already be affected.
How to Fix Swollen Shotgun Shells
In many cases, swollen shells can be restored by cleaning the exterior brass. Removing corrosion allows the shell to return closer to proper dimensions so it can feed, chamber, and extract as intended.
Restore What You Already Paid For
Shotgun shells are purchased to be used, not set aside. When corrosion is removed, many shells can return to service, improving reliability and reducing waste.
A Purpose-Built Solution
RUSTDEEZ™ is a drill-driven tool designed to clean and polish the exterior brass of unfired shotgun shells quickly and consistently. It removes corrosion that causes feeding, chambering, and extraction issues so you can recover what you paid for and maintain what you purchase.
Rust is the problem.
RUSTDEEZ™ is the solution.
THE TRIBE HAS SPOKEN
No Shell Left Behind.