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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Mirage - how much point of impact shift?
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<blockquote data-quote="Darryl Cassel" data-source="post: 20857" data-attributes="member: 34"><p>Hello Len</p><p></p><p>As the temperature rises, so does the bullet.</p><p>For example, if you shoot in an early relay lets say 9:00 AM at Williamsport and win your relay, leave the clicks on the scope, and at 2:30PM during the shoot-off and after the sun has a chance to raise the temp 20 or 30 degrees, your bullet will print up to 12" high. This is with a straight up mirage picture. Have witnessed this many times. </p><p></p><p>The mirage is VERY hard to read at Williamsport and other 1000 yd ranges also. It is a true indicator however, of what is happening between point A (Shooting bench) and point B (Target)at longrange. You have to shoot several shots in the sighter round to know how much the mirage is effecting the bullet downrange. When longrange hunting, this is where your hunting partner with bigeyes is very important. </p><p></p><p>I don't believe anyone or any program can tell you what mirage is worth at all ranges or in every shooting senerio.</p><p>There are just to many variables in longrange shooting.</p><p></p><p>Probably the more one reads into this shooting game, the more confusing it gets.</p><p>A hands on approch as to drop charts (actual fire) and mirage is more benificial to the shooter. We all know that NO ballistics program is 100% correct every day. Even your actual fire will vary from day to day. The same thing seems to work with mirage. It is hard to determine day after day. </p><p> </p><p>Darryl Cassel</p><p></p><p>[ 07-01-2001: Message edited by: Darryl Cassel ]</p></blockquote><p></p>
[QUOTE="Darryl Cassel, post: 20857, member: 34"] Hello Len As the temperature rises, so does the bullet. For example, if you shoot in an early relay lets say 9:00 AM at Williamsport and win your relay, leave the clicks on the scope, and at 2:30PM during the shoot-off and after the sun has a chance to raise the temp 20 or 30 degrees, your bullet will print up to 12" high. This is with a straight up mirage picture. Have witnessed this many times. The mirage is VERY hard to read at Williamsport and other 1000 yd ranges also. It is a true indicator however, of what is happening between point A (Shooting bench) and point B (Target)at longrange. You have to shoot several shots in the sighter round to know how much the mirage is effecting the bullet downrange. When longrange hunting, this is where your hunting partner with bigeyes is very important. I don't believe anyone or any program can tell you what mirage is worth at all ranges or in every shooting senerio. There are just to many variables in longrange shooting. Probably the more one reads into this shooting game, the more confusing it gets. A hands on approch as to drop charts (actual fire) and mirage is more benificial to the shooter. We all know that NO ballistics program is 100% correct every day. Even your actual fire will vary from day to day. The same thing seems to work with mirage. It is hard to determine day after day. Darryl Cassel [ 07-01-2001: Message edited by: Darryl Cassel ] [/QUOTE]
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Mirage - how much point of impact shift?
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