Problems with Lead Bullets in High Power Rifles
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Problems with Lead Bullets in High Power Rifles

Problems with Lead Bullets in High Power Rifles




      

Problems with Lead Bullets in High Power Rifles


Problems with Lead Bullets in High Power Rifles

The high chamber pressure giving great velocity to the bullet, necessitates, in order to secure steadiness of flight, a more rapid twist to the rifling, say one turn to six and a half to twelve inches, instead of the sixteen to twenty-four in the rifles made for black powder. Leaden bullets fired with high velocities through such barrels will not follow the rifling, but will strip and override the lands, for which reason the surface of the projectile is made of some harder metal, but to retain the high specific gravity of the lead with the consequent ability of the ball to better overcome the resistance of the air, the greater portion of the bullet is made of a lead slug and then coated or jacketed with a covering, about 0.02 inch thick, of some hard metal, as steel, copper, nickel, or German silver.

The soft lead bullet of the old rifle is made of about the same or even less diameter of the bore, and then under the effect of its inertia and the blow produced by the combustion of the charge was set out into the grooves of the rifling. With the jacketed bullet the maximum diameter exceeds that of the bore by a difference nearly equal to double the depth of the grooves and the bullet is forced through rather than set out into them.

Farrow, Edward S. American Small Arms; a Veritable Encyclopedia of Knowledge for Sportsmen and Military Men. New York: Bradford, 1904. Print.

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