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Help with drop chart
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<blockquote data-quote="charliewhisky" data-source="post: 2591421" data-attributes="member: 26716"><p>You guys will have to check me on this because I only think I understand it </p><p></p><p>I have had to resort to trial and error and data manipulation in the past because of poor velocity readings or record keeping. Usually this took the form of finding some velocity, or zero, that, when plugged into a calculator made sense of the data.</p><p></p><p>One problem I had was that TBuckus did not ever say that he verified his zero at 100yds.</p><p></p><p>1. I started by thinking about the 300 yd correction. His correction called for an up 8.25 MOA correction and it should have been up 6.5., an error of 1.75 inch. </p><p>2. I started by looking for a zero with a 6.5 inch drop at 300 yds given the stated velocity. Using a165 yd zero I come up with a 6.55 drop at 300 yds. If the "up" correction errors of 3.75 inches and 6.375 inches are removed, then a 30 inch drop at about 480 yds and a 49 inch drop at about 580 yds are shown on the ballistic chart.</p><p>3. it is my opinion that this could be considered a 165 yd zero.</p><p></p><p>I used the "Ballistic AE" app for my calculations.</p><p></p><p>I have to say that this was a lot of fun and I will not be wounded in any way if proven wrong.</p><p>shoot me down.</p></blockquote><p></p>
[QUOTE="charliewhisky, post: 2591421, member: 26716"] You guys will have to check me on this because I only think I understand it I have had to resort to trial and error and data manipulation in the past because of poor velocity readings or record keeping. Usually this took the form of finding some velocity, or zero, that, when plugged into a calculator made sense of the data. One problem I had was that TBuckus did not ever say that he verified his zero at 100yds. 1. I started by thinking about the 300 yd correction. His correction called for an up 8.25 MOA correction and it should have been up 6.5., an error of 1.75 inch. 2. I started by looking for a zero with a 6.5 inch drop at 300 yds given the stated velocity. Using a165 yd zero I come up with a 6.55 drop at 300 yds. If the "up" correction errors of 3.75 inches and 6.375 inches are removed, then a 30 inch drop at about 480 yds and a 49 inch drop at about 580 yds are shown on the ballistic chart. 3. it is my opinion that this could be considered a 165 yd zero. I used the "Ballistic AE" app for my calculations. I have to say that this was a lot of fun and I will not be wounded in any way if proven wrong. shoot me down. [/QUOTE]
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