Quote:
Originally Posted by Buckhead
In my mind to meet the parameters of the original post you would have to take the energy at 350 yards and divide that by the average powder charge to determine the efficiency of payload delivery. Here are the results of some common cartridges and bullet weights.
30-06, 180 gr, - 30.3 ft/lbs per grain of powder
300 WM, 200 gr, - 32.0 ft/lbs per grain of powder
338-06, 210 gr, - 34.0 ft/lbs per grain of powder
338 WM, 210 gr, - 29.6 ft/lbs per grain of powder
35 Whelen, 225 grain - 36.8 ft/lbs per grain of powder
375 H&H, 260 grain - 31.8 ft/lbs per grain of powder
It appears that the 338-06 and 35 Whelen are quite efficient at delivering a heavy payload with the least amount of powder.
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460 Weatherby Mag, 116 grains of powder, 500 grain bullet. K at muzzle 7500 Foot Pounds, K at 350 5500 so 64.7 at the muzzle and 47.4 Foot Pounds per grain at 350. In fact I have more K at 350 than any of you left the muzzle with. I win for the most efficient, using this method. I want the gold star.
And no I am not afraid of any Grimsly bears with this round, or locomotives, space aliens or large burrowing attack worms from the movie Tremors.