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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Hornady 4DOF Ballistic Program
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<blockquote data-quote="Buckammo" data-source="post: 1226717" data-attributes="member: 95955"><p>Nice. A new ballistic program. Unfortunately, the 4DOF prediction for my 143gr. ELD-X starting at 2725fps is wrong by 4.5 MOA (low) at 800 yards. I can shave this down a bit by using their fudge factor. On the other hand I can use JBM or AB and come within 0.5 MOA at 800 and 1000 yards using the measured velocity, the stock G7 BC, and the correct environmentals.</p><p></p><p>I guess I am old school, I still determine my actual drops in the field and then fit that data to a model for extrapolation and interpolation. It sure is easier when your model is close to the observable. </p><p></p><p>John</p></blockquote><p></p>
[QUOTE="Buckammo, post: 1226717, member: 95955"] Nice. A new ballistic program. Unfortunately, the 4DOF prediction for my 143gr. ELD-X starting at 2725fps is wrong by 4.5 MOA (low) at 800 yards. I can shave this down a bit by using their fudge factor. On the other hand I can use JBM or AB and come within 0.5 MOA at 800 and 1000 yards using the measured velocity, the stock G7 BC, and the correct environmentals. I guess I am old school, I still determine my actual drops in the field and then fit that data to a model for extrapolation and interpolation. It sure is easier when your model is close to the observable. John [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Hornady 4DOF Ballistic Program
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