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Updraft question ?
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<blockquote data-quote="Bravo 4" data-source="post: 227811" data-attributes="member: 8873"><p>trueblue,</p><p>Not trying to be a smartallec but where did you come up with that? A 4mph full value wind will only deviate a 300gr SMk (@ 2800fps) 1.5moa off course at 742.5 yards (750 X .99). A 20degree angled up wind would translate into a 1/4 value so that turns the 4 mph wind into a 1 mph wind. A 1mph wind will deviate the 300gr bullet .25moa @ 742 yards, and that is if the wind hits it over the entire range. The updraft the bullet will encounter will only be momentarily when the bullet leaves the muzzle and then it'll be hit with a 4mph zero value head wind. The only elevation change I would make is for the .25moa correction for distance to target(742 not 750). But then again the picture I get from the scenerio is you would be shooting from one hillside/top to another. If that's the case I would be looking for signs of a cross wind in the valley.</p></blockquote><p></p>
[QUOTE="Bravo 4, post: 227811, member: 8873"] trueblue, Not trying to be a smartallec but where did you come up with that? A 4mph full value wind will only deviate a 300gr SMk (@ 2800fps) 1.5moa off course at 742.5 yards (750 X .99). A 20degree angled up wind would translate into a 1/4 value so that turns the 4 mph wind into a 1 mph wind. A 1mph wind will deviate the 300gr bullet .25moa @ 742 yards, and that is if the wind hits it over the entire range. The updraft the bullet will encounter will only be momentarily when the bullet leaves the muzzle and then it'll be hit with a 4mph zero value head wind. The only elevation change I would make is for the .25moa correction for distance to target(742 not 750). But then again the picture I get from the scenerio is you would be shooting from one hillside/top to another. If that's the case I would be looking for signs of a cross wind in the valley. [/QUOTE]
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