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Long Range Hunting & Shooting
Mirage; Reading and Compensation
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<blockquote data-quote="Laguna Freak" data-source="post: 2362369" data-attributes="member: 87188"><p>Today my "work" conditions were such that I was able to run out to the range about 10:30 am to do a little seating depth work at 300 yards. I knew it was forecast to be about 74F and clear but I didn't even consider the mirage potential when I was loading the truck. By the time I sat down at the bench I could detect a faint mirage through the clear lens of my safety glasses. When I looked through the scope, I thought "****, that's disappointing" as my PoA was dancing around in the shape of a daisy head outline while mirage appeared steady from 3:00 to 9:00. At that time the wind was barely perceptible from right to left at the bench and the target is back in the trees. I made sure AO parallax was set, then I adjusted my eyepiece back and forth a bit trying to clear the picture. The PoA daisy head dance remained relentless but was a bit clearer. After about 15 minutes of studying up on reading mirage, because I suck at it, I decided I'd try one round of known performance and go see. At the time, the wind had switched from 2:00 to 11:00 at the bench and was even lighter. The mirage appeared to now be moving from 9:00 to 3:00 at the target. I figured there must be more vertical than I was discerning. So I held about 1" low and 1" left. I felt like my breathing control, steady aim, and trigger squeeze were perfect and I was mildly surprised by the discharge. Well, PoI was 3" low and 4" left. It was pointless to shoot more because I wasn't there to practice mirage reading and compensation. So this evening I found these weblinks that offer some insights. Maybe some of y'all will find them helpful. </p><p></p><p>[URL unfurl="true"]https://www.6mmbr.com/readingmirage.html[/URL]</p><p></p><p>[URL unfurl="true"]http://southtexasshooting.org/multimedia/text/mirage.html[/URL]</p></blockquote><p></p>
[QUOTE="Laguna Freak, post: 2362369, member: 87188"] Today my “work” conditions were such that I was able to run out to the range about 10:30 am to do a little seating depth work at 300 yards. I knew it was forecast to be about 74F and clear but I didn’t even consider the mirage potential when I was loading the truck. By the time I sat down at the bench I could detect a faint mirage through the clear lens of my safety glasses. When I looked through the scope, I thought “****, that’s disappointing” as my PoA was dancing around in the shape of a daisy head outline while mirage appeared steady from 3:00 to 9:00. At that time the wind was barely perceptible from right to left at the bench and the target is back in the trees. I made sure AO parallax was set, then I adjusted my eyepiece back and forth a bit trying to clear the picture. The PoA daisy head dance remained relentless but was a bit clearer. After about 15 minutes of studying up on reading mirage, because I suck at it, I decided I’d try one round of known performance and go see. At the time, the wind had switched from 2:00 to 11:00 at the bench and was even lighter. The mirage appeared to now be moving from 9:00 to 3:00 at the target. I figured there must be more vertical than I was discerning. So I held about 1” low and 1” left. I felt like my breathing control, steady aim, and trigger squeeze were perfect and I was mildly surprised by the discharge. Well, PoI was 3” low and 4” left. It was pointless to shoot more because I wasn’t there to practice mirage reading and compensation. So this evening I found these weblinks that offer some insights. Maybe some of y’all will find them helpful. [URL unfurl="true"]https://www.6mmbr.com/readingmirage.html[/URL] [URL unfurl="true"]http://southtexasshooting.org/multimedia/text/mirage.html[/URL] [/QUOTE]
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