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Why does rifling improve the accuracy of a spherical bullet?
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August 9th, 2009
Rifling (the spiral grooves on the inside of a gun barrel that impart a spin to the bullet) was invented back when bullets were spherical, but they increased the accuracy range of guns by a factor of ten. I can understand the advantage of spin in the case of an elongated bullet to keep it from tumbling, but how would it matter in the case of a smooth sphere?
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