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FullEffect1911
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- Jun 24, 2008
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Assuming you're not using a genuine Aimpoint or EOTech "dot sight" the elevation change could very well be the effect of air temperature on the sight. You can rule this out by shooting with the iron sights and comparing POI on different days.
Humidity will also affect external ballistics although I'd not expect to see a 2" difference from day to day.
-- Chuck
I thought about this too, or at least thought it could be the case. It's a very valid point. What I will do is if the shifting continues I will put my Aimpoint with Bobro mount on the M&P 15-22 just to take away that variable.