Styg has no idea how ammo calibers work and it's been bothering me

Bullets: Sizes, Calibers, and Types [Guide + Videos] - Pew Pew Tactical

This man would rather do his job by putting Portland in the best possible position, than get fleeced, fired, and make the team worse. : r/ripcity

How do ammunition sizes work? With caliber, millimeter and gauge seemingly inconsistent with one another, I can never sort what I'm looking at (non-gun owner). - Quora

Why don't firearms calibers match the actual size of the round? For example, 5.56 NATO bullets are actually 5.7 mm in diameter, and 6.8 Remington SPC are actually 7.0 mm. - Quora

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