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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Compromised BC when using a slower twist barrel
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<blockquote data-quote="Methow Packer" data-source="post: 1347754" data-attributes="member: 67515"><p>Guys wondering about the use of high BC bullets when you don't have a recommended fast twist barrel. According to the twist calculator a 270 cal 170 grain hybrid needs a 8" twist to stabilize properly. Using a 10" barrel the BC is compromised by 6%. Question is does this mean your accuracy is compromised 6%? Could I use this bullet at more moderate ranges and still achieve regular accuracy. Maybe 600-800 yards. The BC would be 318 instead of 338. The adjusted marginal sg is 1.3</p></blockquote><p></p>
[QUOTE="Methow Packer, post: 1347754, member: 67515"] Guys wondering about the use of high BC bullets when you don't have a recommended fast twist barrel. According to the twist calculator a 270 cal 170 grain hybrid needs a 8" twist to stabilize properly. Using a 10" barrel the BC is compromised by 6%. Question is does this mean your accuracy is compromised 6%? Could I use this bullet at more moderate ranges and still achieve regular accuracy. Maybe 600-800 yards. The BC would be 318 instead of 338. The adjusted marginal sg is 1.3 [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Compromised BC when using a slower twist barrel
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