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The Basics, Starting Out
How much can temperature affect POI?
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<blockquote data-quote="tlk" data-source="post: 297867" data-attributes="member: 11397"><p>Here is the problem: I was trying to get a firm idea on the accuracy of a load I was working up and started shooting it in various conditions. Shot one shot two evenings - everything is good at ~.75 inches. Next day I shot in the late morning - after heavy rain the night before and a good mirage. Temperature was some higher, but the sun was hitting the barrel this time (almost sirectly above, before it had been over the horizon).</p><p> </p><p>My shots got crazy wild - like 2". Runout on the bullets was .002, Lapua brass was prepped, and the gun itself was good to go. Wind was about 5 mph with 10 gusts. All shots that day went slightly left, with two going WAY down. I cannot figure out what the hell happened. I thought I was onto a good load. I know POI wouldn't change everything that much, but I am just trying to figure out all of the variables here that could have contributed to this.</p><p> </p><p>Scope is good - had it tested, so I dont think that is it. Mounts and rings are tight. May be the shooter? All shots were in the prone position.</p></blockquote><p></p>
[QUOTE="tlk, post: 297867, member: 11397"] Here is the problem: I was trying to get a firm idea on the accuracy of a load I was working up and started shooting it in various conditions. Shot one shot two evenings - everything is good at ~.75 inches. Next day I shot in the late morning - after heavy rain the night before and a good mirage. Temperature was some higher, but the sun was hitting the barrel this time (almost sirectly above, before it had been over the horizon). My shots got crazy wild - like 2". Runout on the bullets was .002, Lapua brass was prepped, and the gun itself was good to go. Wind was about 5 mph with 10 gusts. All shots that day went slightly left, with two going WAY down. I cannot figure out what the hell happened. I thought I was onto a good load. I know POI wouldn't change everything that much, but I am just trying to figure out all of the variables here that could have contributed to this. Scope is good - had it tested, so I dont think that is it. Mounts and rings are tight. May be the shooter? All shots were in the prone position. [/QUOTE]
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The Basics, Starting Out
How much can temperature affect POI?
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