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Chemistry
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Elements and Compounds
Plural Nouns

What is corrosive ammunition?

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November 26, 2011 6:42PM

Corrosive ammunition is simply any ammunition (usually older military) that uses primers containing potassium chlorate. The residual salts from primer combustion contain potassium chloride, which is highly hygroscopic - water in atmosphere combines with the salt to form a corrosive liquid, which will pit, corrode or rust the rifle bore.

Corrosive salts are water soluble and today, cleanup only requires a few patches soaked with soapy water or even Windex, followed by your favorite bore cleaner.

Consider any WW I or WW II surplus ammunition to be corrosively primed, and clean accordingly.