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No! Both of those cartridges are ACP where it uses the mouth of the case to establish proper head spacing and to prevent the round from dropping too far in to the barrel. The cases are of different lengths. 9mm is 19mm (.754in) and the 380 is .680 in. The 380 will drop in to a 9mm barrel, but would be dangerous to shoot. The action of a 380 will not close on a 9mm.

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15y ago

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