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Do you use an Angle Cosine Indicator (ACI) for uphill/downhill shots?
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<blockquote data-quote="paphil" data-source="post: 505668" data-attributes="member: 17745"><p>Cosine of angle</p><p>5 deg - .4 /100 .996</p><p>10 deg - 1.5/ 100 .985</p><p>15 deg - 3.5/ 100 .966</p><p>20 deg - 6 / 100 .940</p><p>25 deg - 9.5/ 100 .906</p><p>30 deg -13.5/100 .866</p><p>35 deg -18 / 100 .819</p><p>40 deg -23.5/100 .766</p><p>45 deg -29.5/100 .707</p><p>50 deg -35.5/100 .643</p><p>55 deg -42.5/100 .574</p><p>60 deg - 50 / 100 .500</p><p></p><p>A little chart that I plastic coated and cary in my wallet. My binoculars give the angle and then I use the chart .Works for yards or meters The first column is degrees, the second is what must be subtracted for each 100 of distance. For example, a 600 yard shot at 20 degrees, would be 6 X 600 or 36 off the total. Set the scope at 600 -36 = 564. A little math is needed but sure beats guessing! The last column is the cosine and can be directly multiplied by the measured distance to give the hold distance. Using the same 600 yards X .940 = 564.</p></blockquote><p></p>
[QUOTE="paphil, post: 505668, member: 17745"] Cosine of angle 5 deg - .4 /100 .996 10 deg - 1.5/ 100 .985 15 deg - 3.5/ 100 .966 20 deg - 6 / 100 .940 25 deg - 9.5/ 100 .906 30 deg -13.5/100 .866 35 deg -18 / 100 .819 40 deg -23.5/100 .766 45 deg -29.5/100 .707 50 deg -35.5/100 .643 55 deg -42.5/100 .574 60 deg - 50 / 100 .500 A little chart that I plastic coated and cary in my wallet. My binoculars give the angle and then I use the chart .Works for yards or meters The first column is degrees, the second is what must be subtracted for each 100 of distance. For example, a 600 yard shot at 20 degrees, would be 6 X 600 or 36 off the total. Set the scope at 600 -36 = 564. A little math is needed but sure beats guessing! The last column is the cosine and can be directly multiplied by the measured distance to give the hold distance. Using the same 600 yards X .940 = 564. [/QUOTE]
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Do you use an Angle Cosine Indicator (ACI) for uphill/downhill shots?
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