Letter: B

The rotational motion imparted to the bullet by the rifling in the barrel.

A mechanical device used to detect the amount of eccentricity in a bullet between its rotational axis and the outer surface of the bullet.

The spatter and fragmentation of a bullet upon impacting a hard surface.

The principal to account for the steadiness of flight conferred upon an elongated projectile.

The instability of a bullet in flight in which the point of the bullet is not aligned with the direction of flight.

A device to safely stop a bullet in flight. Usually found in indoor ranges behind the target area.

1. In Interior Ballistics: The change of bullet form due to chamber pressure. 2. In Exterior Ballistics: The expansion of a bullet upon impact with target.

A characteristic caused by the eccentricity or imbalance of the bullet to the axis of the bore. See Yaw.

The force required to shorten a cartridge by pushing on the bullet.

In target shooting, the aiming point.