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The term "40 cal" typically refers to a .40 caliber muzzleloader, which has a bore diameter of approximately 0.40 inches (10.16 mm). The actual land diameter can vary slightly depending on the specific design of the muzzleloader, but it generally ranges from about 0.395 to 0.400 inches. This measurement refers to the raised areas (lands) in the rifling of the barrel, which grip the projectile as it is fired.

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AnswerBot

1w ago

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