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 an elephant from a shot to the head when the brain is missed.
19-2076: [REDACTED] Look up Taylor in Wiktionary, the free dictionary. Taylor , Taylors or Taylor's may refer to: People [ edit ] Taylor (surname) List of people with surname Taylor Taylor (given name) , including Tayla and Taylah Taylor sept , a branch of Scottish clan Cameron Justice Taylor (disambiguation) Places [ edit ] Australia [ edit ] Electoral district of Taylor , South Australia Taylor, Australian Capital Territory , planned suburb Canada [ edit ] Taylor, British Columbia United States [ edit ] Taylor, Alabama Taylor, Arizona Taylor, Arkansas Taylor, Indiana Taylor, Louisiana Taylor, Maryland Taylor, Michigan Taylor, Mississippi Taylor, Missouri Taylor, Nebraska Taylor, North Dakota Taylor, New York Taylor, Beckham County, Oklahoma Taylor, Cotton County, Oklahoma Taylor, Pennsylvania Taylors, South Carolina Taylor, Texas Taylor, Utah Taylor, Washington Taylor, West Virginia Taylor, Wisconsin Taylor, Wyoming Taylor County (disambiguation) Taylor Township (disambiguation) Businesses and organisations [ edit ] Taylor's (department store) in Quebec, Canada Taylor Guitars , an American guitar manufacturer Taylor University , in Upland, Indiana, U.S. Taylor's University , commonly referred to as Taylor's, in Subang Jaya, Selangor, Malaysia Taylor's College John Taylor & Co , or Taylor's Bell Foundry, Taylor's of Loughborough, or Taylor's, in England Taylor Company ,
38-454: A frontal head shot with the .416 Rigby and the .470 Nitro Express , two cartridges with similar muzzle energy but different bullet weights. Taylor states that the .416 Rigby will probably not knock the elephant out, but momentarily stun the animal which will recover quickly if not dispatched immediately, while the same shot delivered by the .470 Nitro Express will render the elephant unconscious for up to five minutes. Further, Taylor writes that
57-696: A maker of foodservice equipment owned by Middleby Corporation Science and technology [ edit ] Taylor's theorem , in calculus Taylor series , in mathematics AMD Taylor, alternate name for the Turion 64 X2 computer processor Taylor knock-out factor , for evaluating the stopping power of hunting cartridges Other uses [ edit ] Taylor Series , infinite series of polynomials which asymptotically approaches infinitely differentiable functions Taylor's law , an empirical law in ecology Taylor rule , in economics Taylor Law , an article of New York State Law Taylor (crater) , on
76-644: A maker of foodservice equipment owned by Middleby Corporation Science and technology [ edit ] Taylor's theorem , in calculus Taylor series , in mathematics AMD Taylor, alternate name for the Turion 64 X2 computer processor Taylor knock-out factor , for evaluating the stopping power of hunting cartridges Other uses [ edit ] Taylor Series , infinite series of polynomials which asymptotically approaches infinitely differentiable functions Taylor's law , an empirical law in ecology Taylor rule , in economics Taylor Law , an article of New York State Law Taylor (crater) , on
95-431: Is "surely the most misleading thing in the world", that it is too dependent on muzzle velocity instead of bullet weight and that it is "quite useless if you are trying to compare any two rifles from the point of view of the actual punch inflicted by the bullet" which according to him is more affected by the bullet's weight. In African rifles and cartridges Taylor compares the effect of a near miss of an elephant's brain from
114-439: Is a quantity called, in modern physics, "momentum". Conservation of momentum is a characteristic of non-deformable collisions. A bullet, hitting hard bone, would transfer most of the impulse to that bone mass. John "Pondoro" Taylor, an ivory hunter who over his career shot over 1,000 elephants along with a variety of other African game and who is renowned for writing two books about rifles and cartridges for African hunting, devised
133-528: Is generally shot at medium to long ranges, theoretical mathematical energy may possibly prove a more reliable guide" and that his formula was designed to measure a cartridge's performance against the large, thick skinned, big boned elephant. Below is a table including a number of African dangerous game hunting cartridges including their bullet mass, muzzle velocity, bullet diameter and Taylor KO factor, discussed in African rifles and cartridges . † Included as
152-425: The .577 Nitro Express will knock an elephant unconscious for around 20 minutes, the .600 Nitro Express around half an hour. The Taylor KO factor conforms to the observations and experiences of Taylor who, along with other very successful elephant hunters such as Deaf Banks , Pete Pearson and Jim Sutherland , preferred large heavy bore rifles for elephant hunting in close country. Whilst most acknowledge
171-421: The 7.62×51mm NATO cartridge is 17.7. T K O F = M a s s × V e l o c i t y × D i a m e t e r 3505 , 55 {\displaystyle \mathrm {TKOF} ={\frac {Mass\times Velocity\times Diameter}{3505,55}}} 7.62×51mm NATO in metric : Note: The product of mass and velocity
190-536: The Moon "Taylor" (song) by Jack Johnson, 2004 USS Taylor , the name of several American ships See also [ edit ] All pages with titles beginning with Taylor All pages with titles containing Taylor Tailor (disambiguation) Taylorism , a theory of scientific management, named after Frederick Winslow Taylor Tylor Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with
209-485: The Moon "Taylor" (song) by Jack Johnson, 2004 USS Taylor , the name of several American ships See also [ edit ] All pages with titles beginning with Taylor All pages with titles containing Taylor Tailor (disambiguation) Taylorism , a theory of scientific management, named after Frederick Winslow Taylor Tylor Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with
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#1732766274483228-544: The TKOF than the smaller bore general purpose hunting cartridges such as the .303 British and the .30-06 Springfield . For these reasons the Taylor KO factor is seen as poor measure of stopping power for cartridges used on deer sized game and smaller, it is also seen as a poor measure of the performance of handgun cartridges. Taylor himself acknowledged this, stating "in the case of soft-skinned non-dangerous game, such as
247-544: The Taylor KO factor to place a mathematical value on the concussive effects a cartridge and bullet would have on an elephant, specifically from a shot to the head when the brain is missed, a "knock out" meaning the elephant was sufficiently stunned by the hit that it would not immediately turn on the hunter or flee. First describing the Taylor KO Factor as "knock out value" or "strike energy" in his African rifles and cartridges , Taylor wrote that muzzle energy
266-441: The formula. Specific criticisms of the Taylor KO Factor include the emphasis placed on bullet diameter over factors such as sectional density and bullet expansion and the formula’s failure to account for modern bullet design. These factors, along with Taylor’s dismissal of muzzle energy, allow many obsolete low powered large bore cartridges such as the .577/450 Martini-Henry and the .45-70 Government to have as much as twice
285-1712: The 💕 [REDACTED] Look up Taylor in Wiktionary, the free dictionary. Taylor , Taylors or Taylor's may refer to: People [ edit ] Taylor (surname) List of people with surname Taylor Taylor (given name) , including Tayla and Taylah Taylor sept , a branch of Scottish clan Cameron Justice Taylor (disambiguation) Places [ edit ] Australia [ edit ] Electoral district of Taylor , South Australia Taylor, Australian Capital Territory , planned suburb Canada [ edit ] Taylor, British Columbia United States [ edit ] Taylor, Alabama Taylor, Arizona Taylor, Arkansas Taylor, Indiana Taylor, Louisiana Taylor, Maryland Taylor, Michigan Taylor, Mississippi Taylor, Missouri Taylor, Nebraska Taylor, North Dakota Taylor, New York Taylor, Beckham County, Oklahoma Taylor, Cotton County, Oklahoma Taylor, Pennsylvania Taylors, South Carolina Taylor, Texas Taylor, Utah Taylor, Washington Taylor, West Virginia Taylor, Wisconsin Taylor, Wyoming Taylor County (disambiguation) Taylor Township (disambiguation) Businesses and organisations [ edit ] Taylor's (department store) in Quebec, Canada Taylor Guitars , an American guitar manufacturer Taylor University , in Upland, Indiana, U.S. Taylor's University , commonly referred to as Taylor's, in Subang Jaya, Selangor, Malaysia Taylor's College John Taylor & Co , or Taylor's Bell Foundry, Taylor's of Loughborough, or Taylor's, in England Taylor Company ,
304-454: The originality of the formula and Taylor's broad big-game hunting experience with a wide variety of cartridges, the Taylor KO factor is source of some debate amongst modern gun writers, some describing it as peculiar, antiquated, inaccurate and an unfounded theory, others stating it is a useful tool but stressing that should not be used in isolation when choosing a big-game hunting cartridge, whilst others still say their experiences tend to support
323-423: 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: Using the standard 7.62×51mm NATO cartridge, the cartridge's characteristics are: The calculation is: Therefore the Taylor KO factor for
342-491: The title Taylor . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Taylor&oldid=1220183788 " Categories : Disambiguation pages Place name disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages Taylor From Misplaced Pages,
361-668: The title Taylor . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Taylor&oldid=1220183788 " Categories : Disambiguation pages Place name disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages Taylor knock-out factor 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
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