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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
308 or 6.5CM
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<blockquote data-quote="sfdoc2000" data-source="post: 1998948" data-attributes="member: 76742"><p>Bryan Litz is the chief ballistics person for Berger Bullets and is also on the national F-class team. His books teach us that wind drift is NOT a function of BC but the TIME the bullet is exposed to the wind and the wind speed. There really is negligible resistance to lateral motion for the bullet in flight so the wind drift is mostly independent of the size of the bullet. Where BC comes in, is the higher the BC, the less the bullet slows down in flight, therefore reaching the target faster and less time exposed to the wind. Where things get tricky in long distance shooting is that the wind can change sometimes several times as the bullet travels downrange. What may be the wind at your shooting position may be different from the wind at 500 yards which may be different from the wind at 1000 yards. That's why folks like Litz are such incredible shooters because they can really read the wind conditions downrange. Finally there are different classes in F-class shooting. F-open is open to most any caliber. F-TR (target rifle) is for military caliber (5.56 and 7.62) only. My understanding is that most F-TR guys shoot the 7.62 (.308) bullets.</p></blockquote><p></p>
[QUOTE="sfdoc2000, post: 1998948, member: 76742"] Bryan Litz is the chief ballistics person for Berger Bullets and is also on the national F-class team. His books teach us that wind drift is NOT a function of BC but the TIME the bullet is exposed to the wind and the wind speed. There really is negligible resistance to lateral motion for the bullet in flight so the wind drift is mostly independent of the size of the bullet. Where BC comes in, is the higher the BC, the less the bullet slows down in flight, therefore reaching the target faster and less time exposed to the wind. Where things get tricky in long distance shooting is that the wind can change sometimes several times as the bullet travels downrange. What may be the wind at your shooting position may be different from the wind at 500 yards which may be different from the wind at 1000 yards. That's why folks like Litz are such incredible shooters because they can really read the wind conditions downrange. Finally there are different classes in F-class shooting. F-open is open to most any caliber. F-TR (target rifle) is for military caliber (5.56 and 7.62) only. My understanding is that most F-TR guys shoot the 7.62 (.308) bullets. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
308 or 6.5CM
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