What is a Gun Caliber?
A **gun caliber** refers to the diameter of the barrel and consequently the diameter of the bullet that is fired through it. It plays a vital role in determining the power, recoil, and usage of a firearm.
Popular Caliber Types
- .22 LR – Ideal for small game and beginners
- 9mm – Common in handguns for self-defense and sport
- .45 ACP – Classic American stopping power
- 5.56 NATO / .223 – Popular rifle calibers for AR-style platforms
- .30-30 Win – Western classic used in lever-action rifles
- .357 Magnum – Versatile revolver and lever-action round
- .44 Magnum – Powerful handgun and rifle hunting round
Learn More About Every Caliber
For a complete breakdown of all calibers, detailed specs, and usage tips, visit the official Caliber Dictionary: