Posted on 06/05/2019 5:14:46 AM PDT by w1n1
Another idiot who not only thinks there’s only one metric for “energy” but that kinetic energy is the chief determinant of a rifle cartridge’s effectiveness.
Right? A big more, sentences are.
The original video notes the KO value of the round, referring to Pondoro Taylor’s “Knock Out Value” he assigned to various African game guns, not quite scientific.
“The 1886 was Browning’s first lever action...”
Winchester’s M1886 was the first lever-action repeater designed by John M Browning to enjoy mass production.
Winchester’s M1885 single-shot was the first lever-action John M Browning designed, to see mass production.
Winchester’s M1892, designed by John M Browning, was based on the M1886 - smaller, simplified. It’s widely described as Winchester’s first million-seller: slightly more than 1,000,000 were made before production stopped in the 1930s. But it wasn’t the first: that honor belongs to Winchester’s M1894, which introduced smokeless powder to the sporting rifle market. Serial number 1,000,000 came out of Winchester’s factory in 1927.
“Another idiot who not only thinks there’s only one metric for “energy” but that kinetic energy is the chief determinant of a rifle cartridge’s effectiveness.”
There is only one metric for “energy”, kinetic energy. It is readily calculated -
E = (mv**2)/2
where
E = energy
m = projectile mass
v = projectile velocity
if m is in grains and v is in ft/sec, divide the result by 450380. This is a conversion factor that accounts for dividing by 2, and for the fact that grains are weight, not mass (pounds aren’t mass either). Gravitational acceleration must be factored in.
Stopping power is widely discussed but has no formal, quantifiable definition. Figures derived for the Thompson/Lagarde tests of 1905 were relative, not absolute, and applied to handgun bullets only.
No direct relation between momentum, nor other measures of “stopping power”, has ever been established. Probabilistic correlations have been proposed but no one has ever worked out physical/physiological causality factors. That’s why state hunting regulations specify minimum kinetic energy and sometimes bore diameter for certain game. The military uses delivered kinetic energy on target as a measure of effectiveness of small arms rounds, and has amassed page after page of statistical correlation factors to predict probabilities of incapacitation in various situations. Stuff that isn’t formally classified, but they don’t release details to the public.
A human adversary is simply too variable as a target, to make hard & fast predictions.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.