Within a gun's barrel, lands and grooves cause a bullet to spiral when exiting the barrel of the gun, much in the same way a football spirals when thrown.This ______________________________ pattern left on the bullet is unique to the firearm used to shoot the bullet.

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The Answer of Within a gun's barrel, lands and grooves cause a bullet to spiral when exiting the barrel of the gun, much in the same way a football spirals when thrown.This ______________________________ pattern left on the bullet is unique to the firearm used to shoot the bullet.

Within a Gun's Barrel, Lands and Grooves Cause a Bullet