Ordog et al classified bullet velocity, which correlates with the kinetic energy of the bullet. The authors are from the King/Drew UCLA Medical Center.
Weight Units
Corresponding Weight
1 grain
64.79891 milligrams
1 grain
0.0022857 ounces (avdp.)
1 milligram
0.00003527 ounces (avdp)
1 gram
15.43 grains
Speed in feet/second
Speed in meters/second
Descriptor
0 to 1,200
0 to 366
low
1,200 to 2,500
366 to 762
medium
2,500 to 5,000
762 to 1,524
high
> 5,000
> 1,524
hyper
kinetic energy =
= 0.5 * (mass) * ((velocity)^2)
where:
• 1 joule = 1 kilogram • (meter^2) / (second)^2)
• The velocity of the bullet will decrease during its flight due to air and wind resistance.
The significance of the kinetic energy on impact depends on a number of factors:
(1) angle of impact
(2) area of the bullet at the point of contact
(3) bullet's material (jacketed vs deformable)
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