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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
How accurate are angle cosine indicators?
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<blockquote data-quote="Darryl Cassel" data-source="post: 17426" data-attributes="member: 34"><p>Jeff</p><p></p><p>You don't have to read into the incline shooting as to what you may have.</p><p></p><p>You mentioned that a shot at 600 would be 540 at an angle.</p><p></p><p>What I want from my incline indicator is, how many MOA "difference" is there to the animal at the "ACTUAL" range he is at?</p><p></p><p>If an animal is ranged at 1000 yards and at 30 degrees (up or down), I want to know what the difference is I will need in MOA if he was standing on the level or zero degrees from my rifle at 1000 yards. Hence, two drop charts. You must use the rangfinder and get his range no matter what degree he is standing in the mountain or valley. "Actual" yardage from the rifle barrel to that animal is the key here.</p><p></p><p>For instance, if you run your ballistics chart at zero degrees and 1000 yards and make a drop chart, then program in 30 degrees with no other changes other then degrees, and make another drop chart then you can see the difference of MOA change you will need to make the 30 degree shot if the animal is at the same distance in any degree.</p><p></p><p>Many longrange guns will have a more or less (depending on the angle up or down) at 30 degrees of 2 MOA change from the same distance on the level. </p><p>1 MOA at 1000 yards is roughly 10" so a 20" change was made going from 1000 yards on flat land to a 30 degree shot at 1000 yards also.</p><p></p><p>Run the numbers on your program and you will know what the difference is but, make sure the range is on flat ground or at a 10, 20, or 30 degree shot and is the "SAME" in distance. The rangefinder is the important factor here to.</p><p></p><p>Later</p><p>DC</p><p></p><p>[ 11-27-2003: Message edited by: Darryl Cassel ]</p></blockquote><p></p>
[QUOTE="Darryl Cassel, post: 17426, member: 34"] Jeff You don't have to read into the incline shooting as to what you may have. You mentioned that a shot at 600 would be 540 at an angle. What I want from my incline indicator is, how many MOA "difference" is there to the animal at the "ACTUAL" range he is at? If an animal is ranged at 1000 yards and at 30 degrees (up or down), I want to know what the difference is I will need in MOA if he was standing on the level or zero degrees from my rifle at 1000 yards. Hence, two drop charts. You must use the rangfinder and get his range no matter what degree he is standing in the mountain or valley. "Actual" yardage from the rifle barrel to that animal is the key here. For instance, if you run your ballistics chart at zero degrees and 1000 yards and make a drop chart, then program in 30 degrees with no other changes other then degrees, and make another drop chart then you can see the difference of MOA change you will need to make the 30 degree shot if the animal is at the same distance in any degree. Many longrange guns will have a more or less (depending on the angle up or down) at 30 degrees of 2 MOA change from the same distance on the level. 1 MOA at 1000 yards is roughly 10" so a 20" change was made going from 1000 yards on flat land to a 30 degree shot at 1000 yards also. Run the numbers on your program and you will know what the difference is but, make sure the range is on flat ground or at a 10, 20, or 30 degree shot and is the "SAME" in distance. The rangefinder is the important factor here to. Later DC [ 11-27-2003: Message edited by: Darryl Cassel ] [/QUOTE]
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How accurate are angle cosine indicators?
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