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F-Class (shooting Sport)
The International Confederation of Fullbore Rifle Associations (ICFRA) is the international association for the fullbore rifle shooting sports of Target Rifle ('TR') (in the US 'Palma' Rifle) and F-Class, which are long range competitions shot at distances between 300 and 900 meters or 300 to 1,000 yards depending on the range. F-Class shooters often shoot concurrently with the world's long-range TR shooters and use the same targets, except that the F-Class target has an extra ring half the diameter of the smallest in use for TR. ICFRA manages the programme of World Championships and other major matches for Fullbore Rifle and seeks to standardize the competition rules for TR and F-Class around the world. In competitions, wind reading skills are important. In order to hit their targets competitors must sense wind direction and speed and adjust their sights accordingly by applying knowledge and experience about wind's effect on the Trajectory of the bullet. World Long-Range Rifle T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fullbore Rifle
Fullbore Target Rifle (TR) is a precision rifle shooting sport governed by the International Confederation of Fullbore Rifle Associations (ICFRA). The sport evolved as a distinct British and Commonwealth of Nations discipline from Service rifle (SR) shooting in the late 1960s. Its development was heavily influenced by the British National Rifle Association (NRA). Due to this history, it is contested amongst the shooting events at the Commonwealth Games, although not at the Olympics. World Championships are held on a four-year cycle. The annual NRA Imperial Meeting at Bisley in the UK is globally recognised as a historic annual meeting for the discipline. Nordic fullbore rifle is a variation of fullbore target rifle arranged by the Scandinavian rifle assoctions the National Rifle Association of Norway, the DGI Shooting (formerly De Danske Skytteforeninger) and the Swedish Shooting Sport Federation (formerly Frivilliga Skytterörelsen). Nordic field shooting competitions are shot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swing Rifle
The Swing rifle was a design developed by a number of target shooting enthusiasts who came together in 1970 at Bisley. The design's primary instigators were George Swenson and Laurie Ingram. At the time target rifle competition in the UK was dominated by designs based on military actions such as those of the Lee–Enfield and Mauser 1898. These designs were felt to have reached the limits of their development potential; especially when combined with commercially manufactured or hand-loaded ammunition. Swenson and Ingram's aim was to develop a design that incorporated the best in target rifle design but maintained adherence to the requirement of the British National Rifle Association that rifles should be of a ‘conventional design and safe’ and be within the size and weight constraints imposed by competition rules. Development Swenson had been employed by the London gunmaker John Wilkes of Beak Street and whilst with them had commissioned the manufacture of a 'Universal' tar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Shooting Centre
The National Shooting Centre is the UK's largest shooting sports complex, comprising several shooting ranges as well as the large "Bisley Camp" complex of accommodation, clubhouses and support services. The centre is located near the village of Bisley in Surrey from which it takes its colloquial name "Bisley ranges". The site is wholly owned by the National Rifle Association (NRA). The NSC is the trading name of the facility. History The NRA Imperial Meeting (the Association's National Championship) was first held at Wimbledon Common in 1860. In 1890, the village of Bisley became the location for the NRA Imperial Meeting (the Association's National Championship). The headquarters of the British NRA was also moved from Wimbledon to Bisley Camp at that time. Bisley hosted most of the shooting events in the 1908 Olympic Games, and all the shooting for the 2002 Commonwealth Games. During the 2012 Olympic Games the shooting was held at the Royal Artillery Barracks, Woolwich. As ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ground Pad
In camping, a ground pad, sleeping pad, thermal pad, sleeping mat, or roll mat is lightweight pad, common among hikers, backpackers and budget travelers, often used in conjunction with a sleeping bag. Its purpose is to provide padding and thermal insulation. All types currently available use air as their primary form of insulation. In its simplest form a sleeping pad consists of a foam-like material that is about half a centimeter thick (about a quarter of an inch). The dimensions of the pad are usually about the same length as a sleeping bag and a little wider. Slight variations in design can be found, such as rippling in the foam, but these do not significantly affect the pad's thermal properties. A common misconception is that the pads are primarily for creating a more comfortable sleeping or sitting area. Instead, the primary purpose of the pad is to prevent the loss of body heat into the ground while sleeping. The materials used are typically filled with air pockets, slow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electronic Scoring System
Electronic scoring systems or electronic targets are automated scoring systems used for sport shooting where the shot placement and score is automatically calculated using electronics and presented on screens to the organizer and shooters. The score may also be shown on a big screen for audience at the shooting range, and this has in many ways revolutionized the shooting sport. With traditional paper targets, the audience of a shooting match may have to understand the signals used for scoring and monitor the scores of multiple targets at once, whereas, with electronics, the current scores can be shown on screens immediately after the shot is fired, allowing the audience to quickly see how different shooters compare to each other. Electronic targets automatically gauge the hits so that no physical inspection of hits is needed. Some systems even allow real time publishing on the internet. Scoring can also be held back by the Range Officer (the shooting supervisor) until the string ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shooting Target
Shooting targets are objects in various forms and shapes that are used for pistol, rifle, shotgun and other shooting sports, as well as in darts, target archery, crossbow shooting and other non-firearm related sports. The center is often called the bullseye. Targets can for instance be made of paper, "self healing" rubber or steel. There are also electronic targets that electronically can provide the shooter with precise feedback of the shot placement. History Most targets used in shooting sports today are abstract figures of which origins often are not given much thought, but given the military and hunting origins that started most shooting disciplines it is not hard to understand that many of the targets at some point originally resembled either human opponents in a battle or animals in a hunting situation. For instance, the well known circular bullseye target might originally have resembled a human torso or an animal being hunted. Notable instances of shooting targets with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mirage
A mirage is a naturally-occurring optical phenomenon in which light rays bend via refraction to produce a displaced image of distant objects or the sky. The word comes to English via the French ''(se) mirer'', from the Latin ''mirari'', meaning "to look at, to wonder at". Mirages can be categorized as "inferior" (meaning lower), "superior" (meaning higher) and " Fata Morgana", one kind of superior mirage consisting of a series of unusually elaborate, vertically stacked images, which form one rapidly-changing mirage. In contrast to a hallucination, a mirage is a real optical phenomenon that can be captured on camera, since light rays are actually refracted to form the false image at the observer's location. What the image appears to represent, however, is determined by the interpretive faculties of the human mind. For example, inferior images on land are very easily mistaken for the reflections from a small body of water. Inferior mirage In an inferior mirage, the mirage im ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spotting Scope
A spotting scope is a compact high-power telescope optimized for detailed observation of distant objects. They are used as portable optical enhancement devices for various outdoor activities such as birdwatching, skygazing and other naturalist activities, for hunting and target shooting to verify a marksman's shot placements, for tactical ranging and surveillance, and for any other application that requires higher magnification than ordinary binoculars (typically 20× to 60×). The light-gathering power and resolution of a spotting scope is determined by the diameter of the objective lens, typically between . The larger the objective, the more massive and expensive the telescope. The optical assembly has a small refracting objective lens, an internal image-erecting system, and an eyepiece that is usually removable. The image-erecting system may use relay lenses, prisms such as Porro or roof prisms, or a catadioptric system of the Schmidt or Maksutov design. Spot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
223 Rem
3 (three) is a number, numeral and digit. It is the natural number following 2 and preceding 4, and is the smallest odd prime number and the only prime preceding a square number. It has religious or cultural significance in many societies. Evolution of the Arabic digit The use of three lines to denote the number 3 occurred in many writing systems, including some (like Roman and Chinese numerals) that are still in use. That was also the original representation of 3 in the Brahmic (Indian) numerical notation, its earliest forms aligned vertically. However, during the Gupta Empire the sign was modified by the addition of a curve on each line. The Nāgarī script rotated the lines clockwise, so they appeared horizontally, and ended each line with a short downward stroke on the right. In cursive script, the three strokes were eventually connected to form a glyph resembling a with an additional stroke at the bottom: ३. The Indian digits spread to the Caliphate in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ballistic Coefficient
In ballistics, the ballistic coefficient (BC, ''C'') of a body is a measure of its ability to overcome air resistance in flight. It is inversely proportional to the negative acceleration: a high number indicates a low negative acceleration—the drag on the body is small in proportion to its mass. BC can be expressed with the units kilograms per square meter (kg/m2) or pounds per square inch (lb/in2) (where 1 lb/in2 corresponds to ). Formulas General :C_\text = \frac = \frac where: *''C''b,Physics, ballistic coefficient as used in physics and engineering *''m'', mass *''A'', cross-sectional area *''C''d, drag coefficient *\rho, density *\ell, characteristic body length Ballistics The formula for calculating the ballistic coefficient for small and large arms projectiles ''only'' is as follows: :C_\text = \frac where: *''C''b,Projectile, ballistic coefficient as used in point mass trajectory from the Siacci method (less than 20 degrees). *''m'', mass of bullet *''d'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Backpack
A backpack—also called knapsack, schoolbag, rucksack, rucksac, pack, sackpack, booksack, bookbag or backsack—is, in its simplest frameless form, a fabric sack carried on one's back and secured with two straps that go over the shoulders, but it can have an external frame, internal frame, and there are bodypacks. Backpacks are commonly used by hikers and students, and are often preferred to handbags for carrying heavy loads or carrying any sort of equipment, because of the limited capacity to carry heavy weights for long periods of time in the hands. Large backpacks, used to carry loads over , as well as smaller sports backpacks (e.g. running, cycling, hiking and hydration), usually offload the largest part (up to about 90%) of their weight onto padded hip belts, leaving the shoulder straps mainly for stabilising the load. This improves the potential to carry heavy loads, as the hips are stronger than the shoulders, and also increases agility and balance, since the load ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telescopic Sight
A telescopic sight, commonly called a scope informally, is an optical sighting device based on a refracting telescope. It is equipped with some form of a referencing pattern – known as a '' reticle'' – mounted in a focally appropriate position in its optical system to provide an accurate point of aim. Telescopic sights are used with all types of systems that require magnification in addition to reliable visual aiming, as opposed to non-magnifying iron sights, reflector (reflex) sights, holographic sights or laser sights, and are most commonly found on long-barrel firearms, particularly rifles, usually via a scope mount. The optical components may be combined with optoelectronics to add night vision or smart device features. History The first experiments directed to give shooters optical aiming aids go back to the early 17th century. For centuries, different optical aiming aids and primitive predecessors of telescopic sights were created that had practica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
