Letter: S

1. The reduction in diameter of a bullet by forcing it through a die of smaller diameter than the bullet. 2. The reduction in diameter of a cartridge case by forcing it into a die of smaller diameter than the case.

A tool used to form a cartridge case or bullet to proper dimensions.

A shotgun with a choke of minimal constriction specifically designed for Skeet shooting or may also be used for close range game hunting.

A shotgun target sport in which shooters move around a semi-circle and fire at clay targets thrown at specified angles and from a high and a low “house”, each containing a target trap.

A metal buttplate forming only a border for the butt.

Longitudinal rifling marks formed on the bearing surface of bullets as they enter the rifling of the barrel before rotation of the bullet starts.

A type of gunstock line engraving where lines are omitted at regular intervals. Also called Skip-a-line, or Skip-Line, or French checkering

A special substitute action used for testing a barrel or barrels.

A pin used during assembly of a firearm to facilitate the process and later replaced by a permanent pin or screw.

1. A means of renewing old shotgun barrels by insertion of a tube into the bore or interior of the barrel. 2. A tube surrounding the receiver of a target rifle to improve rigidity. 3. The shot container in a shotshell. 4. The inner, rifled portion of a two-piece barrel.