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Stumped by cross canyon wind
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<blockquote data-quote="cwright" data-source="post: 1059395" data-attributes="member: 43124"><p>Shooting 400, 500, and 600 yards last weekend we dialed in our rifles and were hitting the "gongs" consistently. Had a 2-3 MPH wind but at a near zero value, coming from the 5 o'clock position. Next morning, same place, same targets, same shooting platform, we have a 2-3 MPH breeze at shooting location, and no visible signs of wind down range. Grass blades still, etc. I calculated the 3 MPH left to right, aimed left and missed the gong. Several attempts, still no hit, no splash detectable by my spotter(s). One shooter keeps adjusting aiming point left until he finally hits the gong at 400, and based on his gun's particulars, his successful adjustment would be correction for 10MPH wind. Next shooter adjusts for 10 MPH wind and hits targets at 400, 500, and 600. But we didn't have 10MPH wind. Maybe 2, maybe 3 where we shoot from, hardly even spun my anemometer. POI on a 300 H/H Mag shooting 190 gr. Berger VLD's was almost 20 inches right at 600. Good group, just 20" right.</p><p> </p><p>Reading and googleing on "canyon wind", I'm anxious to hear thoughts from this forum about the predictable affects of shooting cross canyon, in light winds. Can it be howling down the canyon, say 400 feet above canyon floor, but not be blowing on the sides? We're starting to think we need to release a helium filled balloon to see what's happening at our bullets path, because we're not seeing it on the ground. Can anyone offer up any science here. Thanks in advance.</p></blockquote><p></p>
[QUOTE="cwright, post: 1059395, member: 43124"] Shooting 400, 500, and 600 yards last weekend we dialed in our rifles and were hitting the "gongs" consistently. Had a 2-3 MPH wind but at a near zero value, coming from the 5 o'clock position. Next morning, same place, same targets, same shooting platform, we have a 2-3 MPH breeze at shooting location, and no visible signs of wind down range. Grass blades still, etc. I calculated the 3 MPH left to right, aimed left and missed the gong. Several attempts, still no hit, no splash detectable by my spotter(s). One shooter keeps adjusting aiming point left until he finally hits the gong at 400, and based on his gun's particulars, his successful adjustment would be correction for 10MPH wind. Next shooter adjusts for 10 MPH wind and hits targets at 400, 500, and 600. But we didn't have 10MPH wind. Maybe 2, maybe 3 where we shoot from, hardly even spun my anemometer. POI on a 300 H/H Mag shooting 190 gr. Berger VLD's was almost 20 inches right at 600. Good group, just 20" right. Reading and googleing on "canyon wind", I'm anxious to hear thoughts from this forum about the predictable affects of shooting cross canyon, in light winds. Can it be howling down the canyon, say 400 feet above canyon floor, but not be blowing on the sides? We're starting to think we need to release a helium filled balloon to see what's happening at our bullets path, because we're not seeing it on the ground. Can anyone offer up any science here. Thanks in advance. [/QUOTE]
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Stumped by cross canyon wind
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