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Hunting
Long Range Hunting & Shooting
Need help, Sudden elevation drop at 300
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<blockquote data-quote="LazzInc" data-source="post: 880492" data-attributes="member: 39187"><p>you all probably don't need my 2 cents worth, as you have a very informed group here, but I have seen 2-3 fps per degree of variance above or below 72 degrees F using real slow ball powders like H870, AA8700 etc ,,,,,,</p><p> </p><p>in the big Lazz/Wby/RUM mags, using reloader 19, reloader 15 & VVN560, you are looking at 1 to 1.5 fps per degree, above or below 72F ,,,,,,,</p><p> </p><p>the reason that 72 degrees F is important, is that is the temperature that most SAMMI pressure/velocity standards are established at ,,,, to be consistent from caliber to caliber ,,,,,</p></blockquote><p></p>
[QUOTE="LazzInc, post: 880492, member: 39187"] you all probably don't need my 2 cents worth, as you have a very informed group here, but I have seen 2-3 fps per degree of variance above or below 72 degrees F using real slow ball powders like H870, AA8700 etc ,,,,,, in the big Lazz/Wby/RUM mags, using reloader 19, reloader 15 & VVN560, you are looking at 1 to 1.5 fps per degree, above or below 72F ,,,,,,, the reason that 72 degrees F is important, is that is the temperature that most SAMMI pressure/velocity standards are established at ,,,, to be consistent from caliber to caliber ,,,,, [/QUOTE]
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Need help, Sudden elevation drop at 300
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