Ballistics 101: What Is Caliber, Exactly?

Ballistics 101: What Is Caliber, Exactly?

By Nathaniel F

“Caliber”. It can mean a lot of different things, but when we use it, what does it really mean, and what’s its significance? Title image: From left to right are the 7.65 Parabellum, 7.63 Mauser, .300 Blackout, 7.62×45 Czech, .30 Remington, 7.62 NATO, .300 WSM, 7.5×55 Swiss, and .30-06 M2 AP. All of these cartridges are the […]

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