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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
280 AI Ballistics: I need help, I am Confused
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<blockquote data-quote="Coues110" data-source="post: 1875042" data-attributes="member: 79005"><p>With multiple rifles and scopes I've noticed that the error is almost always shooting high at long ranges out to about 900 yards. I have checked calibration on most of them. </p><p></p><p>I've noticed with many rifles that error tends to be on the shooting high side I think the ballistic data on the Hornady ELD bullets was initially published with a lower coefficient than actual so not to overstate the efficiency until they had good data. A faster twist also increases BC. The Hornady 4DOF is a good app to use. Altitude and temperature and humidity are important to consider too, but none of these factors could account for the higher POI on paper. Scopes were calibrated. Shooting West may account for some of the error, but I wasn't. Another mystery that can be practically accounted for by updating your drop chart.</p></blockquote><p></p>
[QUOTE="Coues110, post: 1875042, member: 79005"] With multiple rifles and scopes I've noticed that the error is almost always shooting high at long ranges out to about 900 yards. I have checked calibration on most of them. I've noticed with many rifles that error tends to be on the shooting high side I think the ballistic data on the Hornady ELD bullets was initially published with a lower coefficient than actual so not to overstate the efficiency until they had good data. A faster twist also increases BC. The Hornady 4DOF is a good app to use. Altitude and temperature and humidity are important to consider too, but none of these factors could account for the higher POI on paper. Scopes were calibrated. Shooting West may account for some of the error, but I wasn't. Another mystery that can be practically accounted for by updating your drop chart. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
280 AI Ballistics: I need help, I am Confused
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