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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Need help understanding why my ballistics calculator is doing this!!
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<blockquote data-quote="Scot E" data-source="post: 568264" data-attributes="member: 10832"><p>There are so many things it could be, gonna take you some time to figure it out.</p><p></p><p>First, a ballistic engine like FTE is just a estimation tool. at those distances atmospheric conditions, scope height, spin drift, Coriolis affect, and wind values are going to have to be spot on or you will find large variances. Getting proper numbers for pressure and altitude will cause some big variances. I am not familiar with FTE so I don't know options are best. </p><p></p><p>Also, G7 and G1 BC's will vary to especially at further distances.</p><p></p><p>Have you checked your scope click values? Often overlooked and can cause huge variances.</p><p></p><p>The updraft from a cross wind blowing over rises in the landscape can also increase bullet POI by feet! </p><p></p><p>What is the size of your groups at your zero or some other closer distance? </p><p></p><p>Even if all of the above is fine you still have to go out and verify your drops. I don't know many LR guys that have their drops line up perfectly with their calculators.</p></blockquote><p></p>
[QUOTE="Scot E, post: 568264, member: 10832"] There are so many things it could be, gonna take you some time to figure it out. First, a ballistic engine like FTE is just a estimation tool. at those distances atmospheric conditions, scope height, spin drift, Coriolis affect, and wind values are going to have to be spot on or you will find large variances. Getting proper numbers for pressure and altitude will cause some big variances. I am not familiar with FTE so I don't know options are best. Also, G7 and G1 BC's will vary to especially at further distances. Have you checked your scope click values? Often overlooked and can cause huge variances. The updraft from a cross wind blowing over rises in the landscape can also increase bullet POI by feet! What is the size of your groups at your zero or some other closer distance? Even if all of the above is fine you still have to go out and verify your drops. I don't know many LR guys that have their drops line up perfectly with their calculators. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Need help understanding why my ballistics calculator is doing this!!
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