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Where * mBullet is the bullet mass in grains (1 pound = 7000 grains) * vBullet is the bullet velocity in feet per second * dBullet is the bullet diameter in inches |
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Taylor KO Factor is a commonly used mathematical approach for evaluating the stopping power of hunting cartridges. The term "KO" is an acronym for "Knock Out." The Taylor KO Factor (TKOF) is a figure of merit that allows hunters to compare bullets with respect to stopping power. The TKOF was developed by John "Pondoro" Taylor, a famous mid-20th century hunter and poacher of African big game |
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While pursuing his legendary hunting activities, Taylor observed that some cartridges were more effective at stopping elephants than others. He drew a clear distinction between stopping power and killing ability. Since he was always aiming for a brain shot, a properly placed shot with any of the cartridges he evaluated would kill an elephant. He was more concerned with the case where the shot missed the brain and the wounded elephant could turn and attack him. He wanted a cartridge that would "knock out" an elephant even when the bullet struck in a location that was not immediately lethal. To Taylor, a "knock out" simply meant that the elephant was sufficiently stunned by the hit that he would not immediately turn on the hunter. This would allow the hunter sufficient time for an accurate follow-up shot. |
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John Howard "Pondoro" Taylor (1904 - 1969) was a big-game hunter of Irish descent. Born in Dublin as the son of a surgeon he developed an urge to go to Africa and become a professional hunter. His parents paid for his passage to Cape Town. In Africa he expermimented extensively with calibers and different types of rifles which made him an expert in big game rifles. He is credited with developing the Taylor KO Factor, and authored several books. John Taylor died in 1969 in London. |
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