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What term is used to designate the bore diameter of a shotgun?
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Shot
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Wad
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Gauge
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Chamber
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The term used to designate the bore diameter of a shotgun is "gauge". Gauge refers to the measurement of the diameter of the shotgun's barrel. It is typically expressed as a numerical value, such as 12-gauge or 20-gauge, with a lower number indicating a larger bore diameter. This measurement is important because it determines the size of the shotgun shells that can be used with the firearm.