Letter: E

A recommended safety practice utilizing approved safety glasses.

The vertical distance between the upper-most and lower-most shots.

The distance between the centers of the two shots which are the farthest apart of a group of shots on a target.

The horizontal distance between the farthest right and left shots.

A groove turned in the side wall of a cartridge case just forward of the rim for the purpose of extraction.

Usually a recess in the barrel of a firearm to accommodate an extractor.

Device for withdrawing the cartridge or fired case from the chamber.

The act of withdrawing a cartridge or fired case from the chamber of a firearm.

The branch of Applied Mechanics related to the motion of a projectile from the muzzle of a firearm to the target.

A rear sight that incorporates a shallow “V” sight notch. They are used for fast target acquisition and are typically found on rifles intended for use on dangerous game.