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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
External Ballistics Experiment
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<blockquote data-quote="J E Custom" data-source="post: 1976491" data-attributes="member: 2736"><p>Before all the gadgets and computers, the rule for most rifles was 1 MOA per 10 degrees up or down and 1 MOA for every 10 % change in humidity. It was far from perfect but at the time a 600 yard shot was considered a long shot and it seemed to work well.</p><p></p><p>It will be tough for you to get good information for the differences unless you make many outings. Historical data for many years would help if anyone has any. Hunt at sea level and then going to 8,000 to 11,000 feet with much lower humidity, we generally made our changes and then proofed them By shooting a target at the expected distance to see if adjustments needed to be made.</p><p></p><p>I would suggest that you establish a bench mark for testing under one set of conditions and then test the same loads at the longest distance you feel comfortable with and shoot at least 5 shots and use the center of these groups to establish the measurement center point. </p><p></p><p>The heavy air (humidity) and the lowest altitude always lowered trajectory from any other location.</p><p>so we had to adjust no mater where we went with different conditions. you will have to look for every change to get good results. More than once, one change canceled the effect of another so good data is the only way to get meaningful data. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> </p><p></p><p>Interested in your results.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1976491, member: 2736"] Before all the gadgets and computers, the rule for most rifles was 1 MOA per 10 degrees up or down and 1 MOA for every 10 % change in humidity. It was far from perfect but at the time a 600 yard shot was considered a long shot and it seemed to work well. It will be tough for you to get good information for the differences unless you make many outings. Historical data for many years would help if anyone has any. Hunt at sea level and then going to 8,000 to 11,000 feet with much lower humidity, we generally made our changes and then proofed them By shooting a target at the expected distance to see if adjustments needed to be made. I would suggest that you establish a bench mark for testing under one set of conditions and then test the same loads at the longest distance you feel comfortable with and shoot at least 5 shots and use the center of these groups to establish the measurement center point. The heavy air (humidity) and the lowest altitude always lowered trajectory from any other location. so we had to adjust no mater where we went with different conditions. you will have to look for every change to get good results. More than once, one change canceled the effect of another so good data is the only way to get meaningful data. :) Interested in your results. J E CUSTOM [/QUOTE]
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External Ballistics Experiment
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