A 150-gr .30-'06 bullet will return to earth at 320 feet per second.
A 718-gr .50-caliber bullet will return to earth at about 500 feet per second, with energy of about 400 foot pounds.
A 1000-pound 12-inch artillery shell will return with a speed of about 1300-1400 feet per second and over 28,000,000 ft. lbs. of energy.
- from "Hatcher's Notebook", p514
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2 comments:
Think of all the fun those guys at Hatcher's had doing the field tests to figure that stuff out!
I know, they did it indoors via math, but I still like the visual of a couple of guys at opposite ends of a field:
"Hey Stan, be ready to measure the speed of this here 1000 lb. round."
"Go ahead Pete, fire away."
Some of the tests of the .30-'06 were actual test-firings, straight up, over a body of water. Among their findings were that bullets return to earth "tail down" due to spin imparted by rifling of the barrel. Some boat-tailed .30-'06 bullets were unstable to the point where a burst fired from a machinegun would have some bullets "nose-over". They inferred this when bullets from a single burst came down in two groups, the first in 66 seconds and the second group in one minute and forty-six seconds.
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