Bullets: Sizes, Calibers, and Types [Guide - Pew Pew Tactical
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Feb 11, 2023 · For guns, “caliber” means the diameter of the barrel and thus the diameter of the bullet that is going through it. Usually in inches or mm. Also for terminology’s sake, “bullet” just means the metal projectile, while the entire thing is called a cartridge. Parts of a Bullet Cartridge. Here are some common 9mm bullets. 9mm (115gr vs 124gr vs 147gr)
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