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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 win mag barrel length and rifling
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<blockquote data-quote="LouBoyd" data-source="post: 553115" data-attributes="member: 9253"><p>Bullet stability depends on many factors. One that hasn't been mentioned here is air density. </p><p>Air density is a function mostly of temperature and altitude. While I agree that 10" is the "normal" choice, you might want a faster twist if you shoot in arctic temperatures near sea level or could use a slower twist if you only shoot at a mile elevation in warm weather (like I do). It's better to err on the side a faster twist rate as over spinning will have less detrimental effect than under spinning.</p></blockquote><p></p>
[QUOTE="LouBoyd, post: 553115, member: 9253"] Bullet stability depends on many factors. One that hasn't been mentioned here is air density. Air density is a function mostly of temperature and altitude. While I agree that 10" is the "normal" choice, you might want a faster twist if you shoot in arctic temperatures near sea level or could use a slower twist if you only shoot at a mile elevation in warm weather (like I do). It's better to err on the side a faster twist rate as over spinning will have less detrimental effect than under spinning. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 win mag barrel length and rifling
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