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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Altitude vs. Barometric pressure
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<blockquote data-quote="Michael Eichele" data-source="post: 136943" data-attributes="member: 1007"><p>[ QUOTE ]</p><p>I'm not a weatherman, I don't fly, and don't even know the history of density altitude right now(I have CRS, ADD, and a new one; self imposed misery -SIM). </p><p></p><p>[/ QUOTE ] </p><p></p><p>LOL!</p><p></p><p>I can relate. Sometimes these software issues can cause more headaches than they are worth. Someone once said to me, give a man a program and you will give him a headache. Teach a man to program and he will become an alchoholic.</p><p></p><p>Just trying to learn here. I came up with an example of what I THINK means I understande DA.</p><p></p><p>Example: shooting a given load in standard conditions and the bullet dropping 383.01" @ 1K. Bump only the temerature up to 110 degrees F. it drops only 353.90" @ 1K. By selecting DA and defaulting temp to 59 and humidity to 78% and BP to 29.92, and using only altitude, if I enter 2433' I come up with 353.90". Is this a correct way of understanding and putting to use DA?</p><p></p><p>I do understand its all about pressure and temp and that altitude is only valid by way of its effect on pressure which still goes back to the local pressure being the only one of the two that matters, but there are still other ways of arriving to one accurate bullet drop.</p></blockquote><p></p>
[QUOTE="Michael Eichele, post: 136943, member: 1007"] [ QUOTE ] I'm not a weatherman, I don't fly, and don't even know the history of density altitude right now(I have CRS, ADD, and a new one; self imposed misery -SIM). [/ QUOTE ] LOL! I can relate. Sometimes these software issues can cause more headaches than they are worth. Someone once said to me, give a man a program and you will give him a headache. Teach a man to program and he will become an alchoholic. Just trying to learn here. I came up with an example of what I THINK means I understande DA. Example: shooting a given load in standard conditions and the bullet dropping 383.01" @ 1K. Bump only the temerature up to 110 degrees F. it drops only 353.90" @ 1K. By selecting DA and defaulting temp to 59 and humidity to 78% and BP to 29.92, and using only altitude, if I enter 2433' I come up with 353.90". Is this a correct way of understanding and putting to use DA? I do understand its all about pressure and temp and that altitude is only valid by way of its effect on pressure which still goes back to the local pressure being the only one of the two that matters, but there are still other ways of arriving to one accurate bullet drop. [/QUOTE]
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Altitude vs. Barometric pressure
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