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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Pressure/temp vs trajctory
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<blockquote data-quote="sierra22" data-source="post: 34799" data-attributes="member: 949"><p>Could use a bit of help with my problem, as I'm somewhat a math-lectic.</p><p></p><p>PROBLEM: Correcting trajectory for measured barometric pressure and temperature to score first round hits without sighters.</p><p>Trajectories are to my understanding calculated according to a standard atmosphere. Change this and the bullet will behave differently and the calculated BC will change.</p><p></p><p>SO FAR: If barometric correction X temperature correction X original BC = new BC</p><p>and</p><p>Barometric corr = Standard pressure : measured pressure,</p><p>Temp corr = measured Rankin temp : standard Rankin temp</p><p></p><p>...then I can calculate the deviations (not correctly, but better than not doing it) by working out a new dropchart for the new BC.</p><p></p><p>I WANT: To find correction factors where I can correct directly from a trajectory chart without going the long way around and making a new one.</p><p></p><p>Any takers ? </p><p> <img src="http://images/icons/confused.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>[ 07-23-2004: Message edited by: sierra22 ]</p></blockquote><p></p>
[QUOTE="sierra22, post: 34799, member: 949"] Could use a bit of help with my problem, as I'm somewhat a math-lectic. PROBLEM: Correcting trajectory for measured barometric pressure and temperature to score first round hits without sighters. Trajectories are to my understanding calculated according to a standard atmosphere. Change this and the bullet will behave differently and the calculated BC will change. SO FAR: If barometric correction X temperature correction X original BC = new BC and Barometric corr = Standard pressure : measured pressure, Temp corr = measured Rankin temp : standard Rankin temp ...then I can calculate the deviations (not correctly, but better than not doing it) by working out a new dropchart for the new BC. I WANT: To find correction factors where I can correct directly from a trajectory chart without going the long way around and making a new one. Any takers ? [img]images/icons/confused.gif[/img] [ 07-23-2004: Message edited by: sierra22 ] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Pressure/temp vs trajctory
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