X-Nico

unusual facts about Rifling


Ballistic fingerprinting

Rifling, which first made an appearance in the 15th century, is the process of making grooves in gun barrels that imparts a spin to the projectile for increased accuracy and range.


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Rifling | rifling |

James rifle

Charles T. James developed a rifled projectile and rifling system.

Miller twist rule

The rule of thumb that Greenhill devised based upon his formula is actually what is seen in most places, including Wikipedia.

So our rifling should be roughly 12" per turn. The twist, as listed on Wikipedia's .30-06 article is 10" inches per turn as an average of .30-06 caliber rifles; thus 12" inches per turn is fairly accurate.

Muzzle-loading rifle

The widely adopted solution, invented in 1863 by William Palliser, consisted of enlarging the bore to accept a wrought iron tube (called the A tube) into which the rifling had been cut.

Wadcutter

Shots fired at higher velocities may cause severe leading of the rifling and of the forcing cone, introducing a potentially dangerous condition from overpressure if FMJ (Full Metal Jacket) bullets are subsequently fired without first removing the lead buildup.


see also