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Hunting
Long Range Hunting & Shooting
Improving the 308 Win performance
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<blockquote data-quote="nralifer" data-source="post: 2747978" data-attributes="member: 94556"><p>Yes. This happens not infrequently with lead core jacketed bullets. Have seen it first hand in lead core jacketed 30 cal bullets shot from 300 Norma Improved with a 7.5 twist barrel that otherwise shot our 215 gr ICBM2 bullets to 1/2 MOA. In general the larger the caliber, the tighter the twist and the faster the MV the more likely a lead core bullet will fall apart in mid flight because of the centrifugal forces acting on the jacket to swell it and separate it from the lead core. Probability increases when bullet RPMs reach about 312,000. Does not happen with solid copper or brass bullets.</p></blockquote><p></p>
[QUOTE="nralifer, post: 2747978, member: 94556"] Yes. This happens not infrequently with lead core jacketed bullets. Have seen it first hand in lead core jacketed 30 cal bullets shot from 300 Norma Improved with a 7.5 twist barrel that otherwise shot our 215 gr ICBM2 bullets to 1/2 MOA. In general the larger the caliber, the tighter the twist and the faster the MV the more likely a lead core bullet will fall apart in mid flight because of the centrifugal forces acting on the jacket to swell it and separate it from the lead core. Probability increases when bullet RPMs reach about 312,000. Does not happen with solid copper or brass bullets. [/QUOTE]
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