.400, .404, .450, .475, .500. JUNGLE RIFLES
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.400, .404, .450, .475, .500. JUNGLE RIFLES

.400, .404, .450, .475, .500. JUNGLE RIFLES




      

.400, .404, .450, .475, .500. JUNGLE RIFLES


.400, .404, .450, .475, .500. JUNGLE RIFLES

There is a good deal of similarity in ballistics of the above cartridges, and I have not space to go into them in detail. Their velocities are all in the neighborhood of 2,200 feet, the bullets weigh from 400 to 570 grains, and the muzzle energies are from 4,000 to 5,200 pounds.

All are designed for the very largest game and especially for use in the jungle where a dangerous beast must be stopped in its tracks with a single bullet. Greener asserts that the .500 bore is the largest that should ever have been built in a cordite rifle, those larger having an unbearable recoil. It is impossible to obtain exact figures for the free recoil of the above cartridges, but I should estimate it at from 45 to 60 pounds. I notice our African game shooters are chary about shooting one of these weapons except when the case looks grave. In any event I doubt if anything heavier than the .475-80-500 Jeffery with a striking force of 5,000 pounds, is necessary to kill a whale.

One thing might be noted about these powerful cordite cartridges: All of them are loaded with an amount of powder which permits a considerable air space in the shell, in some instances the shell would hold nearly double the amount of powder placed in it. The purpose of this air space is to reduce breech pressure, which it is said to do very effectively.

Here is a statement from Jeffery in regard to this: "The Jeffery .400 case holds, when filled to the top of the case, 120 grains of water, and the 60 grains of cordite fill the space of 40 grains of water, cordite being practically one-third heavier than water." We thus see that in this shell the powder charge takes up but one-third of the space. Mr. Jeffery gives the breech pressure of one of these giant cartridges as from 14 to 15 tons, something less than half that of the tiny .226112 U. S. Navy, as originally built.

Askins, Charles. Rifles and Rifle Shooting. New York: Outing, 1912. Print.

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