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Hunting
Extreme Long Range Hunting & Shooting (ELR)
temperature effect
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<blockquote data-quote="aroshtr" data-source="post: 717370" data-attributes="member: 9176"><p>None of my programs seem to calculate it either, but I have a benchrest friend that told me about it years ago, and found some post on another forum. I wish I had his book, but maybe somebody will have a copy. Some of the excerpts from the other forum are below. Maybe this info is flawed, but it makes logical sense that it would have some effect.</p><p></p><p>"Later on I looked up my Bryan Litz ballistics book and found a (complex) formula to predict the vertical displacement fairly reliably (P78 or thereabouts) using the Gyro Stability factor of the bullet being used along with its length and calibre plus other factors....... and the calculations do work out close to field-based reality...... the man is a God!"</p><p></p><p>"I've just been sad enough to work all this out using Bryan's formulae - for your 1:8 3000fps 0.264 123grscenar at 200 yards 5mph left wind would require an additional 0.2MOA to be applied so about one and a half 1/8MOA clicks and a 16mph right wind would require 0.6MOA to be taken off so about five 1/8MOA clicks"</p></blockquote><p></p>
[QUOTE="aroshtr, post: 717370, member: 9176"] None of my programs seem to calculate it either, but I have a benchrest friend that told me about it years ago, and found some post on another forum. I wish I had his book, but maybe somebody will have a copy. Some of the excerpts from the other forum are below. Maybe this info is flawed, but it makes logical sense that it would have some effect. "Later on I looked up my Bryan Litz ballistics book and found a (complex) formula to predict the vertical displacement fairly reliably (P78 or thereabouts) using the Gyro Stability factor of the bullet being used along with its length and calibre plus other factors....... and the calculations do work out close to field-based reality...... the man is a God!" "I've just been sad enough to work all this out using Bryan's formulae - for your 1:8 3000fps 0.264 123grscenar at 200 yards 5mph left wind would require an additional 0.2MOA to be applied so about one and a half 1/8MOA clicks and a 16mph right wind would require 0.6MOA to be taken off so about five 1/8MOA clicks" [/QUOTE]
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