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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Zero in Fl to shoot in Mt
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<blockquote data-quote="bootsking" data-source="post: 922167" data-attributes="member: 4596"><p>My 300WM was zeroed at 200yd in NC at 500 feet. Went to Co mid Sept to hunt, the temperature was about the same, and the POI was about 1.5" higher due to the 6000 ft altitude difference. Fast forward a year; went back around Thanksgiving to the same area and the POI shifted 3" low due to the major temperature drop. Same exact loads, same rifle, same 200 yd zero before the hunt. While the ballistic calcs may handle the altitude and air temp shift ok, I doubt your data regarding velocity change due to temperature will be adequate and will require shooting to insure proper performance. </p><p></p><p>Related to that, I always leave my rifle and ammo outside in the truck to stay acclimated to the conditions of the hunt for consistency after zeroing.</p></blockquote><p></p>
[QUOTE="bootsking, post: 922167, member: 4596"] My 300WM was zeroed at 200yd in NC at 500 feet. Went to Co mid Sept to hunt, the temperature was about the same, and the POI was about 1.5" higher due to the 6000 ft altitude difference. Fast forward a year; went back around Thanksgiving to the same area and the POI shifted 3" low due to the major temperature drop. Same exact loads, same rifle, same 200 yd zero before the hunt. While the ballistic calcs may handle the altitude and air temp shift ok, I doubt your data regarding velocity change due to temperature will be adequate and will require shooting to insure proper performance. Related to that, I always leave my rifle and ammo outside in the truck to stay acclimated to the conditions of the hunt for consistency after zeroing. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Zero in Fl to shoot in Mt
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