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Benchrest
Benchrest shooting is a shooting sport discipline in which accuracy and precision, high-precision rifles are rested on a table or countertop, benchrather than being carried in the shooter's handswhile shooting at shooting target, paper or steel targets, hence the name "benchrest". Both the forearm (firearm component), forearm and buttstock of such a rifle are usually fully supported by bean bags, a bipod/monopod (front/rear) combination, and/or a specially designed fixture (tool), fixture device called shooting rest (which may be one- or two-piece depending on competition rules), so that the gun can remain stably pointing at the target without needing to be held by someone. When shooting, the shooter simply sits/stands comfortably behind the table/bench, operates the action (firearms), action and pulls the trigger (firearms), trigger, without needing to worry about carrying any weight of the gun. This is in contrast to other shooting disciplines, where the shooter has to bear at l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Benchrest Shooters
International Benchrest Shooters (IBS) is as a governing body for benchrest shooting that is mainly active in the USA. Disciplines Competitions within IBS are divided into the categories ''Group'' which are benchrest disciplines, and ''Long Range'' which bears some resemblance to F-Class competitions. ;Group: * Benchrest 100 yard (Group or Score) * Benchrest 200 yard (Group or Score) * Benchrest 300 yard (Group or Score) ;Long Range: * Long Range 600 yard * Long Range 1000 yard Targets IBS uses several different target types for different distances and disciplines. ;IBS 100 yard target: Measures , and has black lines on white paper. ;IBS 200 yard target: Measures , and has black lines on white paper. ;IBS 300 yard target: Measures , and has red lines on white paper. ;IBS 1000 yard target: Measures , and has blue lines on white paper, as well as a blue bullseye to make it easier to spot impacts on the paper targets from a distance. Records In 2018, Mike Wilson shot a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World Benchrest Shooting Federation
The World Benchrest Shooting Federation (WBSF) is the international governing body for benchrest shooting, with disciplines for both centerfire and rimfire ammunition. WBSF was formed in 2001. Disciplines Rimfire * 50 m or * Teams (3 shooters, with 6 targets each) * Individual (6 targets) Two Gun * Teams * Individual Light Varmint (LV) * Small Group 100 m (''or '') * Small Group 200 m (''or '') * 100 m aggregate (''or '') * 200 m aggregate (''or '') * Grand Aggregate Heavy Varmint (HV) * Small Group 100 m (''or '') * Small Group 200 m (''or '') * Small Group 300 m (''or '') * 100 m aggregate (''or '') * 200 m aggregate (''or '') * 300 m aggregate (''or '') * Grand Aggregate * Small Group 200 m x10 Shots (''or '') * 200 m x10 Shots Aggregate (''or '') Targets ;WBSF Rimfire Target: *The 10 ring has a diameter of 6,35 mm (0.25 inches), which is 0.06 mrad at 50 meters. *The inner ten ring has a diam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shooting Sport
Shooting sports is a group of competitive and recreational sporting activities involving proficiency tests of accuracy, precision and speed in shooting — the art of using ranged weapons, mainly small arms (firearms and airguns, in forms such as handguns, rifles and shotguns) and bows/crossbows. Shooting sports can be categorized by equipment, shooting distances, targets, time limits and degrees of athleticism involved. Shooting sports may involve both team and individual competition, and team performance is usually assessed by summing the scores of the individual team members. Due to the noise of shooting and the high (and often lethal) impact energy of the projectiles, shooting sports are typically conducted at either designated permanent shooting ranges or temporary shooting fields in the area away from settlements. History Great Britain The National Rifle Association (NRA) was founded in 1859 to raise the funds for an annual national rifle meeting "for the encourag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rifle
A rifle is a long gun, long-barreled firearm designed for accurate shooting and higher stopping power, with a gun barrel, barrel that has a helical or spiralling pattern of grooves (rifling) cut into the bore wall. In keeping with their focus on accuracy, rifles are typically designed to be held with both hands and braced firmly against the shooter's shoulder via a buttstock for stability during shooting. Rifles are used in warfare, law enforcement, hunting and shooting sports, target shooting sports. The invention of rifling separated such firearms from the earlier smoothbore weapons (e.g., arquebuses, muskets, and other long guns), greatly elevating their accuracy and general effectiveness. The raised areas of a barrel's rifling are called ''lands''; they make contact with and exert torque on the projectile as it moves down the bore, imparting a spin. When the projectile leaves the barrel, this spin persists and lends gyroscopic stability to the projectile due to conservatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sighting In
In ranged weapons such as firearms and artillery pieces, the act of sighting in or sight-in is a preparatory or corrective calibration of the sights with the goal of having the projectile (e.g. bullet or shell) placed on a predictable impact position in relation to the sight picture. The principle of sighting-in is to shift the line of aim until it intersects the parabolic projectile trajectory at a designated point of reference, so when the gun is fired in the future (provided there is reliable precision) it will repeatably hit where it aims at identical distances of that designated point. Because when using a telescopic sight, the crosshair lines geometrically resemble the X- and Y-axis of the Cartesian coordinate system where the reticle center is analogous to the origin point (i.e. coordinate ,0, the designated sighting-in point is known as a zero, and the act of sighting-in is therefore also called zeroing. A gunsight that remains true to its designated zero after ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Civil War
The American Civil War (April 12, 1861May 26, 1865; also known by Names of the American Civil War, other names) was a civil war in the United States between the Union (American Civil War), Union ("the North") and the Confederate States of America, Confederacy ("the South"), which was formed in 1861 by U.S. state, states that had Secession in the United States, seceded from the Union. The Origins of the American Civil War, central conflict leading to war was a dispute over whether Slavery in the United States, slavery should be permitted to expand into the western territories, leading to more slave states, or be prohibited from doing so, which many believed would place slavery on a course of ultimate extinction. Timeline of events leading to the American Civil War, Decades of controversy over slavery came to a head when Abraham Lincoln, who opposed slavery's expansion, won the 1860 presidential election. Seven Southern slave states responded to Lincoln's victory by seceding f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rimfire Ammunition
Rimfire ammunition (also rim-fire) is a type of metallic cartridge used in firearms where the primer is located within a hollow circumferential rim protruding from the base of its casing. When fired, the gun's firing pin strikes and crushes the rim against the edge of the barrel breech, sparking the primer compound within the rim and igniting the propellant within the case. Invented in 1845 by Louis-Nicolas Flobert, the first rimfire metallic cartridge was the (also known as the 6mm Flobert) cartridge, which consisted of a percussion cap with a bullet attached to the top. While many other different cartridge priming methods have been tried since the early 19th century, such as teat-fire and pinfire, only small caliber rimfire ( .22caliber (5.6mm) or less) cartridges have survived to the present day with regular use. The .22Long Rifle rimfire cartridge, introduced in 1887, is by far the most common ammunition found in the world today in terms of units manufactured and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Handloading
Handloading, or reloading, is the practice of making firearm cartridges by manually assembling the individual components ( metallic/ polymer case, primer, propellant and projectile), rather than purchasing mass-assembled, factory-loaded commercial ammunition. (It should not be confused with the reloading of a firearm ''with'' cartridges, such as by swapping detachable magazines, or using a stripper clip or speedloader to quickly insert new cartridges into a magazine.) The term ''handloading'' is the more general term, and refers generically to the manual assembly of ammunition cartridges. ''Reloading'' refers more specifically to handloading using previously fired cases and shotshells. The terms are often used interchangeably however, as the techniques are largely the same, whether the handloader is using new or recycled components. The differences lie in the initial preparation of cases or shells — new components are generally ready to load straight out of the box, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shooting Sticks
Shooting sticks are portable weapon mounts commonly used with rifles to brace the weapon on the ground, walls, and other features of the local terrain in order to provide a stable resting position to shoot from; reducing user fatigue and increasing potential accuracy. They are popular with field shooters, such as hunters and snipers, and with metallic silhouette competition shooters using blackpowder rifles. Like monopods, bipods, or tripods, shooting sticks can have one to three legs and be of fixed or adjustable length. However, unlike the aforementioned shooting aids, shooting sticks are not directly attached to the firearm and consequently many stick designs are multi-functional. Some can also serve as, for example, tent supports and trekking poles. Shooting sticks can be anything from homemade DIY solutions made from local vegetation to factory-manufactured commercial products made of carbon fiber. See also *Monopod *Bipod *Tripod A tripod is a portable three-legg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gunsmithing
A gunsmith is a person who repairs, modifies, designs, or builds guns. The occupation differs from an armorer, who usually replaces only worn parts in standard firearms. Gunsmiths do modifications and changes to a firearm that may require a very high level of craftsmanship, requiring the skills of a top-level machinist, a very skilled woodworker, and even an engineer. Gunsmiths perform factory-level repairs and renovations to restore well-used or deteriorated firearms to new condition. They may make alterations to adapt sporting guns to better fit the individual shooter that may require extensive modifications to the firearm's stocks and metal parts. Repairs and redesigns may require fabrication and fitting of unavailable parts and assemblies constructed by smiths themselves. Gunsmiths may also renew metal finishes or apply decorative carvings or engravings to guns. Many gun shops offer gunsmithing service on the premises. Overview Gunsmiths may be employed in: * armories by mi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Confound
In causal inference, a confounder is a variable that influences both the dependent variable and independent variable, causing a spurious association. Confounding is a causal concept, and as such, cannot be described in terms of correlations or associations.Pearl, J., (2009). Simpson's Paradox, Confounding, and Collapsibility In ''Causality: Models, Reasoning and Inference'' (2nd ed.). New York : Cambridge University Press. The existence of confounders is an important quantitative explanation why correlation does not imply causation. Some notations are explicitly designed to identify the existence, possible existence, or non-existence of confounders in causal relationships between elements of a system. Confounders are threats to internal validity. Example Let's assume that a trucking company owns a fleet of trucks made by two different manufacturers. Trucks made by one manufacturer are called "A Trucks" and trucks made by the other manufacturer are called "B Trucks." ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
