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Properly written as .30, it means that the gun fires a bullet 30/100ths of an inch in diameter. Please note there are MANY different cartridges that use .30 bullets- 30-06, .308, 7.62 x 39, .30 carbine, etc. The cartridges are all different shapes and sizes, but all use a .30 bullet.

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14y ago
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14y ago

30 caliber bullet and 30 grains of black powder

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Q: What does 30 30 caliber mean?
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