Shot grouping

In shooting, a shot grouping, or simply grouping, is the placement of multiple shots on a target, the shots taken in one shooting session. The closeness of the grouping, the nearness of all the shots to each other, is a measure of the accuracy of a weapon, and a measure of the shooter's consistency and skill.

Uses of the term

For firearms that shoot one round at a time, a shot grouping can be used to measure the accuracy of the system comprised out of weapon as well as the precision and uniformity of the ammunition by fixing the weapon into position on a test mount, and aiming it at a target. Multiple shots using rounds from same type and batch are fired to observe how the weapon groups the shots. If a person holds the weapon and shoots it, the grouping measures the combination of the person's skill and the weapon's accuracy.

In shotgun shooting, the grouping is also called the pattern. The pattern is the spread of shot from a single shotgun shell, measured as the smallest circle containing all the shots on the target. The barrel of a shotgun is designed to deliver a wide or narrow grouping, depending on the expected use. Shooting at close range indicates a cylinder bore barrel to deliver a wide grouping, while for hunting at longer distances such as 50 yards or meters, a choke is recommended for a tighter grouping.

Group

Group may refer to:

Groups of people

In science and technology

In mathematics

In chemistry

In computing and the internet

Other uses in science and technology

Other uses

Firearm

A firearm is a portable gun, being a barreled weapon that launches one or more projectiles often driven by the action of an explosive force. The first primitive firearms were invented in 13th century China when the one-person-portable fire lance was combined with projectiles. The technology gradually spread through the rest of East Asia, South Asia, Middle East and then into Europe. In older firearms, the propellant was typically black powder, but modern firearms use smokeless powder or other propellants. Most modern firearms (with the notable exception of smoothbore shotguns) have rifled barrels to impart spin to the projectile for improved flight stability.

Modern firearms are usually described by their caliber (i.e. their bore diameter, this is given in millimeters or inches e.g. 7.5mm, .357) or in the case of shotguns their gauge (e.g. 12 ga.); the type of action employed (muzzle, breech, lever, bolt, pump, revolver, semi-automatic, automatic etc.) together with the usual means of deportment (hand-held or mechanical mounting). They may be further distinguished by reference to the type of barrel used (rifled) and the barrel length (19 inch), the design's primary intended use (e.g. hunting rifle), or the commonly accepted name for a particular variation (e.g. Gatling gun). The word firearms usually is used in a sense restricted to small arms (weapons that can be carried by a single person), whereas the word artillery covers larger gunpowder-fired weapons.

Kahr Arms

Kahr Arms is an American small arms manufacturer founded by Kook Jin "Justin" Moon (son of Unification Church founder Sun Myung Moon), who currently serves as CEO and President.

Kahr Arms specializes in compact and mid-size semi-automatic pistols chambered for popular cartridges, including .380 ACP, 9mm Luger, .40 S&W and .45 ACP. Kahr pistols feature polymer or stainless steel frames, single-stack magazines, and double-action-only striker firing actions. Company headquarters is in Pike County, Pennsylvania and the Kahr manufacturing facility is located in Worcester, Massachusetts.

History

From the age of 14, Justin Moon enjoyed shooting guns. At age 18, Moon got a license to carry a handgun, co-signed by one of his older brothers, but he wasn't satisfied with the small calibers available in compact handguns. "I had been licensed to carry in New York State since I was 18 and had looked for an ultra-compact 9mm pistol," Justin later told American Handgunner. "To my chagrin, I could not find a pistol with the quality of construction and features in design which I felt were appropriate for a carry gun. Therefore, I decided to design an ultra-compact 9-mm. pistol that I could carry." By his junior year of college, he decided to design one himself.