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The barrel of a gun is the metal tube a projectile fires out of. Most barrels contain rifling, these are spiraled-grooves on the inside of the barrel to help the projectile shoot straight. This is why rifles are far more accurate than handguns; they have more rifling. The effect is similar to throwing a perfect spiral in football - the projectile is machined through the barrel to make it predictable and more likely to hit the target it is fired at.

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10y ago

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