3 ms·

Ammunition caliber is similarly interesting

• aidenn0 4y ago
  Right .223 Remington has the same bullet diameter of .222 Remington; namely 0.224 inches. Metric dimensions of rifle-cartridges, however, seem to reliably be the land-diameter: 5.56x45, 7.62x51, and 7.62x39 all have eponymous land-diameters.