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Hunting
Long Range Hunting & Shooting
Need help, Sudden elevation drop at 300
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<blockquote data-quote="Michael Eichele" data-source="post: 879917" data-attributes="member: 1007"><p>Atmospheric conditions will change a 300 yard zero very little. Much less than 3" for your situation anyway. Parallax, lighting and or mirrage get my vote. It takes pretty severe temp/pressure changes for you poi to change by 1 MOA at 300 yards. 30-40 degrees isn't going to cause what you're seeing. Unless your ammo is hyper sensitive to temp swings causing a harmonic distortion, exterior ballistics in and of themselves are not the problem here. Since your last session and this sessions accuracy (group sizes) were very good, I doubt there is a load/barrel hypersensitivity issue here either. Caulk it up to lighting or parallax or both. It's easy to underestimate their contributions to this game.</p><p></p><p>M</p></blockquote><p></p>
[QUOTE="Michael Eichele, post: 879917, member: 1007"] Atmospheric conditions will change a 300 yard zero very little. Much less than 3" for your situation anyway. Parallax, lighting and or mirrage get my vote. It takes pretty severe temp/pressure changes for you poi to change by 1 MOA at 300 yards. 30-40 degrees isn't going to cause what you're seeing. Unless your ammo is hyper sensitive to temp swings causing a harmonic distortion, exterior ballistics in and of themselves are not the problem here. Since your last session and this sessions accuracy (group sizes) were very good, I doubt there is a load/barrel hypersensitivity issue here either. Caulk it up to lighting or parallax or both. It's easy to underestimate their contributions to this game. M [/QUOTE]
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Need help, Sudden elevation drop at 300
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