Firearms Facts Episode 4: Taylor Knockout Formula

Published on July 10, 2012
Duration: 6:56

This expert guide, presented by an authoritative instructor, breaks down the physics behind firearm ballistics. It details the standard energy formula and John Taylor's TKO formula, offering practical comparisons between various calibers, including the extreme .950 JDJ. The content emphasizes understanding projectile mass, velocity, and diameter for effective hunting and terminal ballistics analysis.

Quick Summary

Learn the difference between foot-pounds of energy and the Taylor Knockout (TKO) formula. The standard energy formula is (Velocity² x Bullet Weight) / 450,240, while TKO is (Weight x Velocity x Diameter) / 7,000. Understanding both provides a comprehensive view of a projectile's terminal ballistics, with the .950 JDJ serving as an extreme example of power.

Chapters

  1. 00:00Standard Foot-Pounds Formula
  2. 00:35Taylor Knockout Formula (TKO)
  3. 01:40Comparing Energy vs. Knockout
  4. 02:13The .950 JDJ
  5. 04:27John Taylor's Legacy

Frequently Asked Questions

What is the standard formula for calculating foot-pounds of energy in firearms?

The standard factory formula for calculating foot-pounds of energy is (Velocity x Velocity x Bullet Weight) / 450,240. This calculation is widely used to assess the kinetic energy of a projectile.

How is the Taylor Knockout (TKO) formula different from the energy formula?

The Taylor Knockout (TKO) formula, developed by John Taylor, is (Projectile Weight x Velocity x Diameter) / 7,000. It emphasizes projectile mass and diameter for estimating 'stopping power,' offering a different perspective than pure energy calculations.

What makes the .950 JDJ cartridge so powerful?

The .950 JDJ is exceptionally powerful due to its massive 3,600-grain bullet fired at 2,200 fps, resulting in over 38,000 ft-lbs of energy and a TKO value of 1,075. It's considered one of the world's most potent sporting rifle rounds.

Why is projectile diameter important in ballistics?

Projectile diameter is crucial because it directly impacts the wound channel created. A larger diameter, as emphasized by the TKO formula, can contribute significantly to a bullet's 'stopping power' even if its raw energy is lower than a narrower projectile.

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