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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Copper vs lead
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<blockquote data-quote="trubkir17" data-source="post: 2020967" data-attributes="member: 112555"><p>Velocity of the bullet isn't as much of a factor on stability as I thought. Playing around with the JBM calculator and moving velocity around by 1000fps doesn't affect the stability factor that much. Twist rate and bullet length have much more effect.</p><p>I am thinking that copper bullets are longer and most factory barrel twist rates start to go yellow or even red when you get to the heavier (and longer) copper bullets. This correlates with my own experience where it seemed counter intuitive that a 120gr barnes bullet performed much better on game than the 160gr bullet out of my Win70 7mmRM.</p></blockquote><p></p>
[QUOTE="trubkir17, post: 2020967, member: 112555"] Velocity of the bullet isn't as much of a factor on stability as I thought. Playing around with the JBM calculator and moving velocity around by 1000fps doesn't affect the stability factor that much. Twist rate and bullet length have much more effect. I am thinking that copper bullets are longer and most factory barrel twist rates start to go yellow or even red when you get to the heavier (and longer) copper bullets. This correlates with my own experience where it seemed counter intuitive that a 120gr barnes bullet performed much better on game than the 160gr bullet out of my Win70 7mmRM. [/QUOTE]
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Copper vs lead
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