#3042490 - 11/20/12 05:30 PM
Trajectory Question
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Wannabe
Spike
Registered: 01/02/09
Posts: 32
Loc: Sumner County
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If I sight a .270 to zero at 100yds. Then shoot a target at 100 yds, that is at a 10% downhill grade. where whould the bullet hit? 100yds. up hill?
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#3042499 - 11/20/12 05:35 PM
Re: Trajectory Question
[Re: Wannabe]
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mr.big
Non-Typical
Registered: 01/03/01
Posts: 27931
Loc: Copper Head Road
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close enough to not even think about it,
_________________________
Tndeer`s resident poacher and desperate loser
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#3042531 - 11/20/12 05:52 PM
Re: Trajectory Question
[Re: mr.big]
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Wannabe
Spike
Registered: 01/02/09
Posts: 32
Loc: Sumner County
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Then let's talk 200 - 300 - 400 ...
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#3042532 - 11/20/12 05:53 PM
Re: Trajectory Question
[Re: mr.big]
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Wannabe
Spike
Registered: 01/02/09
Posts: 32
Loc: Sumner County
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The problem with not worrying about it is the extended ranges of 200, 300, 400, 500...
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#3042537 - 11/20/12 06:00 PM
Re: Trajectory Question
[Re: Wannabe]
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Nhill
8 Point
Registered: 09/30/01
Posts: 1398
Loc: Maryville, TN
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The yardage does not matter, only the slope.
Angles 10 or less do not make any noticeable difference.
For angles greater than 10 degrees:
Multiply the slant range by .97 for a 15 degree angle
.87 for a 30 degree angle
.71 for a 45 degree slope.
For example if you had a 350 yard shot at 45 degrees, you would multiply 350*.71 and get 248.5. You would treat that shot as a 248.5 yard shot. It works the same for up or down hill slopes, you will hit high either way.
I don't quite understand it all,but that is what my ballistics book says.
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#3042630 - 11/20/12 06:46 PM
Re: Trajectory Question
[Re: Nhill]
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FULLDRAWXX75
12 Point
Registered: 01/29/07
Posts: 5499
Loc: Adirondack Mtns, NY
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Slightly long read, but explains the whole thing pretty good..........
http://www.exteriorballistics.com/ebexplained/5th/33.cfm
FDXX75
_________________________
“Two things are infinite: the universe and human stupidity; and I'm not sure about the universe.”
― Albert Einstein
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#3042706 - 11/20/12 07:43 PM
Re: Trajectory Question
[Re: FULLDRAWXX75]
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Wannabe
Spike
Registered: 01/02/09
Posts: 32
Loc: Sumner County
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Thank you Fulldraw. That is exactly what I was looking for.
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