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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Hornady ELD-X Official Thread
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<blockquote data-quote="Pdvdh" data-source="post: 1131783" data-attributes="member: 4191"><p>Since I'm the one that started the bearing surface discussion in your thread, I thought I should respond. I doubt that a 0.004" shorter bearing surface would be a sufficient offsetting factor in MV, compared to the 12gr heavier bullet. </p><p></p><p>The reason I provided the MV data on the Berger 210VLD versus the Berger 215Hybrid was because these bullets are popular with enough members of this Forum that there's been quite of bit of consistent MV data shared confirming that the heavier 215gr bullet can be safely launched to a higher MV than the lighter 210gr bullet. Not out of only one rifle, but from a multitude of different rifles and different barrels. And not just 5-10fps faster. More on the order of 50fps faster. </p><p></p><p>Truth is, I don't have such extensive documentation from examples of other bullets. I know a bullet with a longer bearing surface will create more bullet to bore friction, which will serve to reduce MV. But I can't put any numbers to the magnitude of the reduction in MV for the myriad of other available bullets, either from personal experience - or from other's posted experiences. The best you could do with the information I provided is recognize that the difference in the bearing surface lengths was much larger with the two Berger bullets, compared to the 0.004" difference that you've identified between these two Hornady bullets. So I wouldn't expect bearing surface length differences of 0.004" to have a comparable affect on MV.</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 1131783, member: 4191"] Since I'm the one that started the bearing surface discussion in your thread, I thought I should respond. I doubt that a 0.004" shorter bearing surface would be a sufficient offsetting factor in MV, compared to the 12gr heavier bullet. The reason I provided the MV data on the Berger 210VLD versus the Berger 215Hybrid was because these bullets are popular with enough members of this Forum that there's been quite of bit of consistent MV data shared confirming that the heavier 215gr bullet can be safely launched to a higher MV than the lighter 210gr bullet. Not out of only one rifle, but from a multitude of different rifles and different barrels. And not just 5-10fps faster. More on the order of 50fps faster. Truth is, I don't have such extensive documentation from examples of other bullets. I know a bullet with a longer bearing surface will create more bullet to bore friction, which will serve to reduce MV. But I can't put any numbers to the magnitude of the reduction in MV for the myriad of other available bullets, either from personal experience - or from other's posted experiences. The best you could do with the information I provided is recognize that the difference in the bearing surface lengths was much larger with the two Berger bullets, compared to the 0.004" difference that you've identified between these two Hornady bullets. So I wouldn't expect bearing surface length differences of 0.004" to have a comparable affect on MV. [/QUOTE]
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Hornady ELD-X Official Thread
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