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Rifles, Reloading, Optics, Equipment
Reloading
Ballistic Coefficient (BC)
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<blockquote data-quote="Bart B" data-source="post: 125993" data-attributes="member: 5302"><p>[ QUOTE ]</p><p>So why is the hollow point so darn accurate with that drag producing hole in the front?</p><p></p><p>[/ QUOTE ]According to Sierra Bullets, hollow point bullets have a more uniform dimension at the junction of the body to the boattail/base. If one checks the bullets for out of round at this point using a V block and dial indicator reading in .0001-inch increments, the difference is obvious.</p><p></p><p>Sierra used to make their 180- and 200-grain 30 caliber match bullets in a full-metal jacket type with solid tip and hollow base. After experimenting with hollow point versions of the same weights/shapes and noting the dimensional and accuracy improvements, they changed to hollow point versions. The difference in drag between the solid and hollow point versions was insignificant.</p></blockquote><p></p>
[QUOTE="Bart B, post: 125993, member: 5302"] [ QUOTE ] So why is the hollow point so darn accurate with that drag producing hole in the front? [/ QUOTE ]According to Sierra Bullets, hollow point bullets have a more uniform dimension at the junction of the body to the boattail/base. If one checks the bullets for out of round at this point using a V block and dial indicator reading in .0001-inch increments, the difference is obvious. Sierra used to make their 180- and 200-grain 30 caliber match bullets in a full-metal jacket type with solid tip and hollow base. After experimenting with hollow point versions of the same weights/shapes and noting the dimensional and accuracy improvements, they changed to hollow point versions. The difference in drag between the solid and hollow point versions was insignificant. [/QUOTE]
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Ballistic Coefficient (BC)
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