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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
cz550 7mm rem mag 1:95 twist
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<blockquote data-quote="benchracer" data-source="post: 1150574" data-attributes="member: 22069"><p>The Berger website shows an optimum twist of 1:9.1 for the 7mm 180 grain Hunting VLD. I don't know where you are getting 1:11. Perhaps you are looking at .30 caliber bullets?</p><p> </p><p>I would expect your 1:9.5 twist to stabilize the 180's without issues, but your bc will be compromised by about 6% at sea level, according to the twist calculator on Berger's website. If hunting at 4000 feet above sea level, or higher, the 180 VLD will be fully stable and yield its full bc value.</p></blockquote><p></p>
[QUOTE="benchracer, post: 1150574, member: 22069"] The Berger website shows an optimum twist of 1:9.1 for the 7mm 180 grain Hunting VLD. I don't know where you are getting 1:11. Perhaps you are looking at .30 caliber bullets? I would expect your 1:9.5 twist to stabilize the 180's without issues, but your bc will be compromised by about 6% at sea level, according to the twist calculator on Berger's website. If hunting at 4000 feet above sea level, or higher, the 180 VLD will be fully stable and yield its full bc value. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
cz550 7mm rem mag 1:95 twist
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