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Hunting
Long Range Hunting & Shooting
High and Low Impact - Early morning & Late afternoon
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<blockquote data-quote="Pdvdh" data-source="post: 1361637" data-attributes="member: 4191"><p>Besides the affect of lighting on POI, last winter I took 4-5 different rifles out and tested their POIs thru differing temperatures over time. Over weeks & months of time. One of my rifles was reasonably consistent over the duration of time on POI.</p><p></p><p>The disappointing results with the others caused me to accept the fact that if I really want to know where my rifles will impact, I'd best shoot them when I arrive at base hunting camp immediately prior to any long range engagements on game. Most of my rifles experienced slight and variable/unreliable shifts in POI over time. Enough to be problematic at long range. All my testing was at 280yds. One shot per rifle over time in differing outdoor temps and lighting conditions. The sun gets pretty low in the sky up here during the winter. So perhaps the natural sunlight and position of the sun in the sky relative to my target was part of the cause. I don't have enough time in my life to figure out the exact cause of these small shifts in POI over time. There are simply too many possibilities, one of which includes me.</p><p></p><p>By the way, all of my rifles are carefully free-floated and glass bedded, and they include rock solid one-piece scope rails and quality scope bases. Two are BAT actions with the scope rail manufactured into the action. Most are full custom. All are at least partial custom. I don't attribute the shifts in POI to shoddy equipment or lack of knowledge. </p><p></p><p>There are simply too many variables to nail it down in any exact manner, IMO. Like the Twilight Zone... the inexplicable.</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 1361637, member: 4191"] Besides the affect of lighting on POI, last winter I took 4-5 different rifles out and tested their POIs thru differing temperatures over time. Over weeks & months of time. One of my rifles was reasonably consistent over the duration of time on POI. The disappointing results with the others caused me to accept the fact that if I really want to know where my rifles will impact, I'd best shoot them when I arrive at base hunting camp immediately prior to any long range engagements on game. Most of my rifles experienced slight and variable/unreliable shifts in POI over time. Enough to be problematic at long range. All my testing was at 280yds. One shot per rifle over time in differing outdoor temps and lighting conditions. The sun gets pretty low in the sky up here during the winter. So perhaps the natural sunlight and position of the sun in the sky relative to my target was part of the cause. I don't have enough time in my life to figure out the exact cause of these small shifts in POI over time. There are simply too many possibilities, one of which includes me. By the way, all of my rifles are carefully free-floated and glass bedded, and they include rock solid one-piece scope rails and quality scope bases. Two are BAT actions with the scope rail manufactured into the action. Most are full custom. All are at least partial custom. I don't attribute the shifts in POI to shoddy equipment or lack of knowledge. There are simply too many variables to nail it down in any exact manner, IMO. Like the Twilight Zone... the inexplicable. [/QUOTE]
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