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Rifles, Reloading, Optics, Equipment
Reloading
Temperature efftect on powder MV and where to correct?
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<blockquote data-quote="EXPRESS" data-source="post: 1226849" data-attributes="member: 1441"><p>After testing my latest load I have found I get about 2.6fps variation in MV per one degree celcius of temperature drop. </p><p></p><p>The accuracy load I have at the moment shoots very well at 2485fps, but what I want to find out is; is it better to adjust your trajectory to the temps, or adjust your load to the temps?</p><p></p><p>In this case I developed the load in warm temps, 27C, but my hunting will probably be in temps from 0 - 15C. That means a drop in MV of around 50fps. If I add 1.5grains of powder I know I will be back around 2485fps. But in todays temps, that puts me out of the accuracy node. </p><p></p><p>The ideal would be to do your load development and zeroing in the same confitions to your hunting, but when that isn't possible, I wonder which option is going to maintain the accuracy?</p><p></p><p>Surely it's the powder (MV) and not the correction?</p></blockquote><p></p>
[QUOTE="EXPRESS, post: 1226849, member: 1441"] After testing my latest load I have found I get about 2.6fps variation in MV per one degree celcius of temperature drop. The accuracy load I have at the moment shoots very well at 2485fps, but what I want to find out is; is it better to adjust your trajectory to the temps, or adjust your load to the temps? In this case I developed the load in warm temps, 27C, but my hunting will probably be in temps from 0 - 15C. That means a drop in MV of around 50fps. If I add 1.5grains of powder I know I will be back around 2485fps. But in todays temps, that puts me out of the accuracy node. The ideal would be to do your load development and zeroing in the same confitions to your hunting, but when that isn't possible, I wonder which option is going to maintain the accuracy? Surely it's the powder (MV) and not the correction? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Temperature efftect on powder MV and where to correct?
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