The Definition of Ballistics
The science of cartridge discharge and the bullet's flight. Internal ballistics deals with what happens inside of a firearm upon discharge.
External ballistics is the study of a projectile's flight, and terminal ballistics is the study of the impact of a projectile.
19 Other Firearms Definitions You Need To Know
A sidelock action where the mainspring is mounted rearward towards the butt.
The back action is often used in double rifles where the need for strength requires as
little steel as possible be removed from the bar of the action.
A rifle front sight with a extra-large, folding bead. Typically, in addition to the normal fine bead (which allows for more precision) the larger bead,
while at a cost of potential accuracy, is more readily acquired in marginal light. Also called a Gloaming sight
Abbreviation for Double Action Only. Is a type of firearm in which the firing mechanism cannot be cocked in a single-action stage. Firing always occurs as a double-action sequence where pulling the trigger both cocks and then fires the gun.
A straight-wrist grip, typical on English shotguns, built for graceful aesthetics, light weight and fast handling.
To explode with great violence. It is generally associated with high explosives e.g. TNT, dynamite, etc., and not with the relatively slow-burning smokeless gunpowders that are classed as propellants.
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The size of the pellets in a shotgun shell.
A short cylindrical rod of hardened steel running laterally near the front of the bar of a break-open gun's
action around which the barrel hook revolves when the gun is opened. Over the decades, this pin and its
complimentary hook can wear and a gun can sometimes "shoot loose" or "come off the face." The proper cure
for this condition is to replace the hinge pin with a new one, slightly oversized, to compensate for wear
on both itself and on the barrel hook.
The bottom of the butt-end of a gun stock.
A black powder muzzleloading firearm action which relies upon a serpentine or S-shaped piece of metal to hold a smoldering match.
By pressing the lower end of the serpentine,
the upper end holding the burning match contacts the priming powder in the pan.
The beginning of the bore of a rifled firearm. The transition between the chamber and the rifling. The area most vulnerable to erosion from high velocity cartridges.
A small metal cup that contains a tiny explosive charge that is sensitive to impact.
A primer is placed in the base of a shell casing to ignite the powder of the completed cartridge.
It is detonated by the striking of a firing pin in the firearm.
The "packaged" components that are needed in order to fire in a case or shell holding a primer,
(which produces the spark) a charge of propellant (gunpowder) and a projectile (bullets, slug or pellets.)
Sometimes called "fixed ammunition" to differentiate from the individual components placed separately in muzzleloaders.
A single unit of ammunition in modern firearms is called a cartridge. The units of measure for quantity of ammunition is rounds.
There are hundreds of sizes of ammunition, examples include .223 Remington, 9mm Luger, 30.06, .308 Winchester,
.300 Winchester Magnum, and .50 Browning Machine Gun (BMG). The ammunition used must match the firearm.
A shotgun shooting sport that combines elements of skeet and trap, and that is designed to simulate field conditions.
A bullet shape with a flat nose rather than a rounded one.
The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF, BATF, and BATFE) is a federal law enforcement organization within the United States Department of Justice. Its responsibilities include the investigation and prevention of federal offenses involving the unlawful use, manufacture, and possession of firearms and explosives; acts of arson and bombings; and illegal trafficking of alcohol and tobacco products. The ATF also regulates via licensing the sale, possession, and transportation of firearms, ammunition, and explosives in interstate commerce. Many of ATF's activities are carried out in conjunction with task forces made up of state and local law enforcement officers, such as Project Safe Neighborhoods. ATF operates a unique fire research laboratory in Beltsville, Maryland, where full-scale mock-ups of criminal arson can be reconstructed.
A rear barrel sight base, more articulated than having the sight simply dovetailed into the barrel, but not requiring as much gunsmithing as having it mounted onto a proper quarter-rib.
Two shots fired in rapid succession. Generally without getting a new sight picture on the target. If the second shot is fired after a second sight picture is captured it may instead be called a controlled pair.
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