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How much force or energy does it take to ignite a primer?

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Unfortunately, there is no set answer to this question. Primers require not only a certain amount of threshold energy to cause ignition, but the rate of application of that energy is important to the reliable functioning of these devices.

Primers are tested by dropping a standardized steel ball from a range of heights. The percentage that fire from each height is reviewed mathematically to provide a measure of sensitivity. It is a SAAMI procedure with a Mil-Spec heritage.


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