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The Part That Rifling Plays | |
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The Part That Rifling Plays
The instant the bullet strikes the air after leaving the muzzle of the gun certain other forces begin to act on it, and these make up what is known as the science of external ballistics.
First of all, the rifling of the gun, as I have pointed out before, makes the bullet spin on its long axis. If a long bullet—that is, a bullet whose length is greater than its diameter—was shot from a smooth-bore gun the air resistance would make it rotate, that is, turn over and over, on its short axis.
But when a bullet leaves a barrel that is rifled it spins on its long axis like a top, and this more than offsets any tendency it may have to spin round on its short axis, and the result is that it bores its way through the air in a much straighter line than is taken by an ordinary round bullet.
Collins, A. Frederick. Shooting, for Boys,. New York: Moffat, Yard and, 1917. Print.
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