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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Hot & Cold
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<blockquote data-quote="elkaholic" data-source="post: 450924" data-attributes="member: 13833"><p>No difference that I am aware of. Someone else may have some knowledge that I don't have? I can tell you for sure that the 68 degree difference in temp that you refer to can make a big difference with some powders and could definitely affect POI. What are you loading for and what is your powder? The affect of degrees of air temp alone will cause considerable difference in POI at long range since cold air is more dense. Add to that the powder temp, and you can REALLY have issues. I would suggest that you go on line to JBM ballistics under trajectory and plug in the variables. You will soon see how much affect you have. Some powders are known to vary as much as 150'/second with extreme temp changes.......Rich</p></blockquote><p></p>
[QUOTE="elkaholic, post: 450924, member: 13833"] No difference that I am aware of. Someone else may have some knowledge that I don't have? I can tell you for sure that the 68 degree difference in temp that you refer to can make a big difference with some powders and could definitely affect POI. What are you loading for and what is your powder? The affect of degrees of air temp alone will cause considerable difference in POI at long range since cold air is more dense. Add to that the powder temp, and you can REALLY have issues. I would suggest that you go on line to JBM ballistics under trajectory and plug in the variables. You will soon see how much affect you have. Some powders are known to vary as much as 150'/second with extreme temp changes.......Rich [/QUOTE]
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