In africa last september, a red hartebeest fell one shot at 500 meters (550 yards for metrically impaired). About 5 minutes after I also clean missed a shorter shot at same animal at 350 meters across an open valley
. but that was when he moved same time I shot. THere really was no way to get across a valley with three inches of grass cover... and we had stalked a mile plus for the shot...
it was in the words of the PH: "as good a shot as any this year".
140 NAB, 62 grains Re22, CCI 200, Nosler ackley brass. chronos at 3200 mas or menos.