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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
A new spin drift and coriolis question (I think) Exbal
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<blockquote data-quote="jmason" data-source="post: 278694" data-attributes="member: 10486"><p>I posed some questions to Gerald Perry and I am posting what he replied. BTW seems like a pretty good guy. The black is me and red was his reply.</p><p></p><p><span style="color: black">I have the most recent release of EXBAL for PPC (there is a chance I missed something in the software) and to determine Spin Drift it must be measured and input into the program for it to calculate at various ranges. Once I measure these at distance and input the data, then I can forget about the<em> <u>horizontal</u></em> portion of Coriolis Effect function in Exbal? From the data I gave it on my SD will it now incorporate both spins by using that data? </span><span style="color: red"> Not exactly. Coriolis is not a spin it is a deflection. Spin drift occurs no mater what the azimuth of your line of sight. So that only the Coriolis deflection for the azimuth of your measurement of SD will be accounted for.</span></p><p> <span style="color: black"></span></p><p><span style="color: black">The CE function comes up as a separate page and is not automatically incorporated in the drop data like SD can be, correct?</span><span style="color: red">That's correct. It should not be a problem unless you are shooting artillery .</span></p><p><span style="color: red"></span></p><p><span style="color: red"></span><span style="color: black">Lets say I measured my SD and input it in Exbal, then I decide to shot at 1200yds. I put in my conditions, range, latitude, and target direction. The out put will not include CE. I have to go to "options" and select CE then deduct the range info on that chart from my target engagement chart if I want to use the vertical portion of the CE, right?</span><span style="color: red">Yes although generally the Coriolis displacements are within the accuracy limits of the finest long range rifles.</span><span style="color: black"></span></p><p><span style="color: black"></span></p></blockquote><p></p>
[QUOTE="jmason, post: 278694, member: 10486"] I posed some questions to Gerald Perry and I am posting what he replied. BTW seems like a pretty good guy. The black is me and red was his reply. [COLOR=black]I have the most recent release of EXBAL for PPC (there is a chance I missed something in the software) and to determine Spin Drift it must be measured and input into the program for it to calculate at various ranges. Once I measure these at distance and input the data, then I can forget about the[I] [U]horizontal[/U][/I] portion of Coriolis Effect function in Exbal? From the data I gave it on my SD will it now incorporate both spins by using that data? [/COLOR][COLOR=red] Not exactly. Coriolis is not a spin it is a deflection. Spin drift occurs no mater what the azimuth of your line of sight. So that only the Coriolis deflection for the azimuth of your measurement of SD will be accounted for.[/COLOR] [COLOR=black] The CE function comes up as a separate page and is not automatically incorporated in the drop data like SD can be, correct?[/COLOR][COLOR=red]That’s correct. It should not be a problem unless you are shooting artillery . [/COLOR][COLOR=black]Lets say I measured my SD and input it in Exbal, then I decide to shot at 1200yds. I put in my conditions, range, latitude, and target direction. The out put will not include CE. I have to go to "options" and select CE then deduct the range info on that chart from my target engagement chart if I want to use the vertical portion of the CE, right?[/COLOR][COLOR=red]Yes although generally the Coriolis displacements are within the accuracy limits of the finest long range rifles.[/COLOR][COLOR=black] [/COLOR] [/QUOTE]
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A new spin drift and coriolis question (I think) Exbal
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