Military corrosive ammunition dating

Mercuric primers pose a problem to handloaders in that once fired, the mercury amalgamates with the brass and causes it to become brittle.If such a case survives its trips through a sizing die, it may eventually fail upon firing.

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You can elect to not reload these cases without the need of a jury of scientists to support your decision.While a great many people apparently believe answers to political and social questions will fit nicely on a bumper sticker, we need a bit more space for a comprehensive understanding of the corrosive primer adventure if we’re to answer such questions knowledgably.The answer itself poses a question: “Corrosive to what? Mercuric primers, those containing fulminate of mercury, date back to 1822, when Alexander Forsyth patented the percussion cap, the corrosive igniting mixture of which was later carried over into metallic cartridge Boxer and Berdan primers.The problem may be more serious with brass cartridge cases, which are much thinner than a brass ship’s bell.Brass cartridge cases are an alloy of about 70 percent copper and 30 percent zinc.

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