What Is a Caliber? The Number Is Not the Bullet
SAAMI uses the word “caliber” eight times and never defines it. What the number actually measures, why the bullet is always wider, and where the rule breaks.
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Rifle Caliber Chart: 26 Cartridges Drawn to Scale
A .270 fires a .278-inch bullet and a 7.62×39 fires a .311. Twenty-six rifle cartridges drawn to scale from the SAAMI standard’s own dimensions.
