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Taylor Knock Out (TKO) Scale

Discussion in 'Ammunition & Reloading' started by mesinge2, Mar 2, 2010.

  1. mesinge2

    mesinge2 Florida Member

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    I thought some people might like this data. I computed it based on the factory released velocity information with their corresponding barrel lengths during their tests.

    TKO Scale Compairsons.jpg

    The formula used in the John "Pondoro" Taylor Knock Out (TKO) Scale for measuring power of calibers. Developed by an African hunter named John "Pondoro" Taylor. Basically, you multiply diameter of bullet in inches times muzzle velocity times bullet weight in grains divided by 7,000.


    P.S. the 25 suprised me

    TKO Scale Compairsons.jpg
     
  2. jib

    jib Central OR Active Member

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    Ok I'm not sure if I got this right :confused: let's say my 300 Win mag throws a 180gr bullet at 3,000 FPS. Then .308 X 3,000= 924 x 180=166,320/7,000= 23.76 :huh:
    I'd rather be facing a grizzly with a 300 win.mag. rifle than a 44 mag. pistol.
     
  3. NWPilgrim

    NWPilgrim Portland area Member

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    Taylor's Knock Out factor was intended only for comparing large bore rifle cartridges in terms of ability to stun an elephant. It was not intended to be used for handguns and small bore rifles, nor for comparing terminal ballistic performance in soft tissue.

    It may be interesting to compare TKOs amoung smaller calibers but keep in mind its original purpose and scope.