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Long Range Hunting & Shooting
Long Range Incline and Declined Angle Shots
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<blockquote data-quote="SBruce" data-source="post: 464459" data-attributes="member: 21068"><p>rscott5028,</p><p> </p><p>Yes, I suppose that shooting position had some effect on muzzle rise, but that can't really be calculated. I think we should use the most accurate calculations possible because things (just like you mentioned) can and do happen. I don't doubt geometry or trigonometry. In fact; I use both very extensively every day........it's my job<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> Oil companies pay me pretty decent $$'s to hit their targets that are 2 or 3 miles away.</p><p> </p><p>sp6X6,</p><p> </p><p>We actually don't need to know the angle if we know the line of sight distance and the horizontal distance. That's how the cosine value is calculated. </p><p> </p><p>Try this: 282.8 yds (horizontal distance) divided by 400 yds (line of sight distance) and we get .707 not coincidence, .707 is also the cosine of 45 degrees (the angle)..............The shoot to distance (pythagorean theorem) or using the cosine of the line of sight distance both give the same result.</p><p> </p><p>The other method, (which Sierra and NF ballistic programs use) results in a different answer. It is only a couple inches in the rockchuck example, but at least 2 out of my 3" error was due to the simpler and more recognized "cosine of the angle times the distance" method.</p><p> </p><p>When your indicator reads 96, how is that supposed to be used? Are you supposed to dial 96% of your normal dope?.........I've never used one like that.</p><p> </p><p>I see now, the 96 is actually .96 or the approximate Cosine of 15 degrees, .94 being Cosine of 20 degrees, .99 being Cosine of 5 degrees............now I can visualize what you're getting at.</p><p>gun)</p></blockquote><p></p>
[QUOTE="SBruce, post: 464459, member: 21068"] rscott5028, Yes, I suppose that shooting position had some effect on muzzle rise, but that can't really be calculated. I think we should use the most accurate calculations possible because things (just like you mentioned) can and do happen. I don't doubt geometry or trigonometry. In fact; I use both very extensively every day........it's my job:) Oil companies pay me pretty decent $$'s to hit their targets that are 2 or 3 miles away. sp6X6, We actually don't need to know the angle if we know the line of sight distance and the horizontal distance. That's how the cosine value is calculated. Try this: 282.8 yds (horizontal distance) divided by 400 yds (line of sight distance) and we get .707 not coincidence, .707 is also the cosine of 45 degrees (the angle)..............The shoot to distance (pythagorean theorem) or using the cosine of the line of sight distance both give the same result. The other method, (which Sierra and NF ballistic programs use) results in a different answer. It is only a couple inches in the rockchuck example, but at least 2 out of my 3" error was due to the simpler and more recognized "cosine of the angle times the distance" method. When your indicator reads 96, how is that supposed to be used? Are you supposed to dial 96% of your normal dope?.........I've never used one like that. I see now, the 96 is actually .96 or the approximate Cosine of 15 degrees, .94 being Cosine of 20 degrees, .99 being Cosine of 5 degrees............now I can visualize what you're getting at. gun) [/QUOTE]
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