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Taylor Knock-out Factor
The Taylor knock-out factor, also called Taylor KO factor or TKOF, is a formulaic mathematical approach for evaluating the stopping power of hunting cartridges, developed by John "Pondoro" Taylor in the middle of the 20th century. Taylor, an elephant hunter and author who wrote two books about rifles and cartridges for African hunting, devised the formula as a means of comparing the ability of a cartridge to deliver a knock out blow to elephant from a shot to the head when the brain is missed. Formula The Taylor KO factor multiplies bullet mass (measured in grains) by muzzle velocity (measured in feet per second) by bullet diameter (measured in inches) and then divides the product by 7,000, converting the value from grains to pounds and giving a numerical value from 0 to ~150 for normal hunting cartridges. It is proportional to the momentum at the muzzle times the diameter of the bullet. Expressed as a fraction, the Taylor KO Factor is: :\mathrm=\frac Example calculation Using ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stopping Power
Stopping power is the ability of a weapon – typically a ranged weapon such as a firearm – to cause a target (human or animal) to be incapacitated or immobilized. Stopping power contrasts with lethality in that it pertains only to a weapon's ability to make the target cease action, regardless of whether or not death ultimately occurs. Which ammunition cartridges have the greatest stopping power is a much debated topic. Stopping power is related to the physical properties and terminal behavior of the projectile (bullet, shot, or slug), the biology of the target, and the wound location, but the issue is complicated and not easily studied. Although higher- caliber ammunitions usually have greater muzzle energy and momentum and thus traditionally been widely associated with higher stopping power, the physics involved are multifactorial, with caliber, muzzle velocity, bullet mass, bullet shape and bullet material all contributing to the ballistics. Despite much disagreem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
425 Westley Richards
The .425 Westley Richards is one of the classic African big-game rounds. It is a cartridge invented by Leslie Bown Taylor of Westley Richards, a gunmaking firm of Birmingham England in 1909 as a proprietary cartridge for their bolt-action rifles. Since before 1912 Rigby were Mauser agents in the UK and managed to persuade Oberndorf to develop and produce special Magnum actions for them, other British companies who wanted to compete with their .400/350 Nitro Express big five game hunting rifles had to improvise and use standard-length Gewehr 98 actions, which only allow approximately 84 mm cartridges to fit into the magazine (a bonus was having a shorter bolt throw). The round was the first in Great Britain (and the first major in the world) to have a rebated rim, one that is smaller in diameter than the case body, an invention which Taylor patented in 1908. This allowed it to be used in converted G98 rifles with standard bolt faces and not have them weakened by widening. Howe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
404 Jeffery
The .404 Jeffery is a rifle cartridge designed for hunting large, dangerous game animals, such as the " Big Five" (elephant, rhino, cape buffalo, lion and leopard) of Africa. The cartridge is standardized by the C.I.P. and is also known as .404 Rimless Nitro Express. It was designed in 1905 by London based gunmaker W.J. Jeffery & Co to duplicate the performance of the .450/400 Nitro Express 3-inch in bolt-action rifles. The .404 Jeffery fired a bullet of .422 in (10.72 mm) diameter of either with a muzzle velocity of and muzzle energy of or with a muzzle velocity of and of energy. It is very effective on large game and is favored by many hunters of dangerous game. The .404 Jeffery was popular with hunters and game wardens in Africa because of its good performance with manageable recoil. By way of comparison, the .416 Rigby and .416 Remington Magnum cartridges fire .416 in (10.57 mm) bullets of 400 gr (26 g) at with a muzzle energy of approximately . These cartr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
450/400 Nitro Express
45 may refer to: * 45 (number) * one of the years 45 BC, AD 45, 1945, 2045 Film * ''45'' (film), directed by Peter Coster (2009) * ''.45'' (film), directed by Gary Lennon (2006) Music * ''45'' (Jaguares album), 2008 * ''45'' (Kino album), 1982 * "45" (Bon Iver song), 2016 * "45" (The Gaslight Anthem song), 2012 * "45" (Shinedown song), 2003 * "45" (Elvis Costello song), 2002 *"Forty Five", a song by Karma to Burn from the album ''Appalachian Incantation'', 2010 *45 rpm record or 45, a common form of vinyl single Other uses * Donald Trump, the 45th President of the United States, with the nickname "45" * ''45'' (book), written by Bill Drummond *.45 caliber, a family of firearm cartridges ** A nickname for a handgun chambered in .45 caliber, such as the M1911 pistol or Colt Single Action Army **.45 ACP, pistol cartridge **.45 Colt, revolver cartridge * Jacobite rising of 1745 or "The '45", in the United Kingdom * Forty-fives, a card game *'The 45%', collective term used by Scottis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
400 Jeffery Nitro Express
4 (four) is a number, numeral (linguistics), numeral and numerical digit, digit. It is the natural number following 3 and preceding 5. It is the smallest semiprime and composite number, and is tetraphobia, considered unlucky in many East Asian cultures. In mathematics Four is the smallest composite number, its proper divisors being and . Four is the sum and product of two with itself: 2 + 2 = 4 = 2 x 2, the only number b such that a + a = b = a x a, which also makes four the smallest squared prime number p^. In Knuth's up-arrow notation, , and so forth, for any number of up arrows. By consequence, four is the only square one more than a prime number, specifically 3, three. The sum of the first four prime numbers 2, two + 3, three + 5, five + 7, seven is the only sum of four consecutive prime numbers that yields an Parity (mathematics), odd prime number, 17 (number), seventeen, which is the fourth super-prime. Four lies between the first proper pair of twin primes, 3, three and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
375 H&H Magnum
__NOTOC__ Year 375 ( CCCLXXV) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year after the Consulship of Augustus and Equitius (or, less frequently, year 1128 ''Ab urbe condita''). The denomination 375 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * November 17 – Emperor Valentinian I concludes an enduring peace with the Alamanni in Germany, then marches into Illyricum to repel an invasion of the Quadi and the Sarmatians on the Danube frontier. While negotiating with the Quadi, Valentinian, age 54, becomes so enraged that he dies in a fit of apoplexy at Brigetio (Hungary). Extreme cruelty has marked his 11-year reign, but he has also founded schools and provided physicians to serve the poor of Constantinople. * The Quadi accept an uneasy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
350 Rigby
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35 or XXXV may refer to: * 35 (number), the natural number following 34 and preceding 36 * one of the years 35 BC, AD 35, 1935, 2035 * ''XXXV'' (album), a 2002 album by Fairport Convention * ''35xxxv'', a 2015 album by One Ok Rock * "35" (song), a 2021 song by New Zealand youth choir Ka Hao * "Thirty Five", a song by Karma to Burn from the album ''Almost Heathen'', 2001 * III-V, a type of semiconductor material A semiconductor is a material which has an electrical conductivity value falling between that of a conductor, such as copper, and an insulator, such as glass. Its resistivity falls as its temperature rises; metals behave in the opposite way. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
338 Winchester Magnum
__NOTOC__ Year 338 ( CCCXXXVIII) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Ursus and Polemius (or, less frequently, year 1091 ''Ab urbe condita''). The denomination 338 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * The Romans, allied with the Goths, arrive in the north of the Roman Empire to protect the Danube frontier. * Emperor Constantius II intervenes against the Persians in Armenia. Persia * Shapur II, king of the Persian Empire, begins a widespread persecution of Christians. He orders forcible conversions to the state religion, Zoroastrianism, lest the Christians disrupt his realm while he is away fighting the Romans in Armenia and Mesopotamia. Asia * Tuoba Yihuai, ruler of the Tuoba Dai clan, dies and is su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
333 Jeffery
__NOTOC__ Year 333 ( CCCXXXIII) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Dalmatius and Zenophilus (or, less frequently, year 1086 ''Ab urbe condita''). The denomination 333 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * Flavius Dalmatius and Domitius Zenofilus are appointed consuls. * Emperor Constantine the Great pulls Roman troops out of Britain, and abandons work on Hadrian's Wall. * Calocaerus revolts against Constantine I and proclaims himself emperor. Flavius Dalmatius, responsible for the security of the eastern frontier, is sent to Cyprus to suppress the rebellion. * December 25 – Constantine I elevates his youngest son Constans to the rank of ''Caesar'' at Constantinople. China * Shi Hong succeeds his father ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
318 Westley Richards
Year 318 ( CCCXVIII) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Licinianus and Crispus (or, less frequently, year 1071 ''Ab urbe condita''). The denomination 318 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * Emperor Constantine the Great gives the ancient Roman town Drepana (Asia Minor) the name Helenopolis, after his mother Helena, and builds a church in honour of the martyr St. Lucian. * Constantine the Great is given the title Brittanicus Maximus, for successful engagements in Britain. Asia * The Chinese Empire loses its territories to the north of the Yangtze River, to the benefit of the Xiongnu and the Xianbei. The Former Zhao state is proclaimed; Liu Can and the state ruling family at Pingyang is executed in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
277 Fury
{{Numberdis ...
77 may refer to: * 77 (number) * one of the years 77 BC, AD 77, 1977, 2077 Music * 77 (band), a Spanish hard rock band * ''77'' (Matt Kennon album) * '' Talking Heads: 77'', debut album by Talking Heads * ''77'' (Nude Beach album), an album by the band Nude Beach See also * '77 (other) * 7/7, the 7 July 2005 London bombings * * List of highways numbered A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College, an undergraduate division of the Jewish Theological Seminary of America * SC Germania List, German rugby union ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
