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45 = .451

9mm = .355

The .45 handgun throws the bigger and heavier bullet. The 9mm fires a lighter and smaller bullet, but at a higher speed. The size of the guns that fire either of these rounds could be the same size. Both 9mm pistols and .45 pistols come in full sized guns, compact guns, and even sub-compact or micro sized.

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13y ago
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Q: Which is bigger 9mm handgun or 45cal handgun?
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