twist of rifling

twist of rifling

[′twist əv ′rīf·liŋ]
(ordnance)
Inclination of the spiral grooves (rifling) to the axis of the bore of a weapon; it is expressed as the number of calibers of length in which the rifling makes one complete turn.
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References in periodicals archive ?
In ballistics discussions of bullet weight and velocity, the subject also comes up as to the rate of twist of rifling.
I read a comment in the July issue and wanted to comment on the reason for the right-hand twist of rifling.