170, at 800 meters the bullet has a remaining velocity
of only 523 fps and energy of 75 ft-lbs.
This is still more than enough energy for elk, and with a remaining velocity
of 2,246 fps, the Scirocco mushrooms beautifully at that distance and well beyond.
This paper addresses the wounding potential and power of a soft-nose bullet at the striking velocity and the remaining velocity when fired through glass of various thicknesses.
Since velocity is an important factor in the wounding power of a bullet, an answer could be found if the remaining velocity of the components of the soft-nose bullet, like the lead core or the jacket fragments after perforating the glass, is known.
Consisting of over 400 tables, graphs and examples, FSI's book plots various pellet trajectories from 5 to 75 yards for zeros at 10, 20, 30, 40 and 50 yards -- plus it includes wind drift, time of flight, and remaining velocity
It also computes all necessary external ballistics based on an instantly changeable zero range -- data such as bullet path, wind deflection, remaining velocity
and energies -- then computes a "power factor" based on momentum.
Likewise, the remaining velocity of the bullet should be great enough at 400 yards to adequately penetrate and expand.
After a lifetime of pronghorn hunting, both professionally and for my own sport, I've come to the conclusion that a cartridge for pronghorn hunting should deliver the bullet on target with a minimum remaining velocity of 2,000 feet per second (fps)--about what's needed in any caliber to afford proper penetration and reasonable bullet expansion on an animal the size of a pronghorn.
Remaining velocity at that distance is 2,240 fps and energy is 356 ft.
All this means that the little bullet has plenty of remaining velocity for expansion well beyond the 400-yard mark, and there is enough energy even for coyote-size game beyond that distance as well.
The other columns show remaining velocity
in fps and bullet drop in inches at 300, 400 and 500 yards.
Accuracy was nearly equal, of course, because I was after a load that will deliver that bullet on target at 300-plus yards with enough remaining velocity
to give good penetration and expansion.