I understand that when you are positioned uphill from your target and are shooting on a downhill slope, you will need to dial less elevation or have a lower hold. What about if you are shooting uphill? Do you dial more elevation or a higher hold? Does shooting targets uphill and downhill have any effect on the amount of windage needed? For instance, let's just assume that your target is 800 yards away and on a downhill slope. You have determined that due to the slope that you need a 725 yard hold on elevation. Do you calculate your windage needed for 800 yards or 725 yards? I know that this basically all comes down to physics and may be an elementary question for some but I am in the dark when it comes to shooting on substantial slopes. Everywhere that I shoot is relatively flat. Thanks in advance for any input on this question.
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md_jones88
Mar 05, 2017
Shooting on a Slope
Shooting on a Slope
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Check Rex's video https://youtu.be/cKqZdHRlKfo?list=PLJUaiRIEduNXoal2_PkBZi0vDCIcEPxUn
As I understand it, you dial for actual horizontal range, but your atmospheric corrections (temp, barometric pressure, and wind) use the measured distance. Rex explains it much better!
I don't think Rex is telling the full story here. If you shoot up at a target, gravity pulls your bullet down and it also pulls your bullet back. If you shoot down at something gravity still pulls your bullet down. But it also pulls your bullet forward.
To express this imagine two extreme angles at 80• up and at 80° down. Your up bullet gets pulled down and back, slowing down the bullet. And your bullet down gets pulled forward adding speed to the bullet, or at least not slowing down as much as when you shoot up.
Theoretically there is a difference between shooting uphill vs downhill. Practically don't even think about it... the cosine or the horizontal distance is not quite correct but is good enough.