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Rifles, Reloading, Optics, Equipment
Gunsmithing
Improving a barrel by lapping.
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<blockquote data-quote="ButterBean" data-source="post: 1965560" data-attributes="member: 41385"><p>Huh, Well why aren't you shooting 100's then? it sure looked like it was shooting those 95's with pinpoint accuracy, and it's no myth 12 twist is to slow for the 95's and up, you can run that in any modern day twist calculator and find the same answer </p><p></p><p><strong>New 100gr 6mm Match Bullet — More Velocity Than 105/108</strong></p><p>Long-range benchresters have had great success with the Berger 108gr match bullet, introduced in 2007. Given the popularity of its tangent-ogive 108, Berger has been developing a shorter, lighter version, which can shoot faster than the 108 in small cartridges such as the 6mmBR, 6mmAR (6-6.5 Grendel), and 6 PPC. The new 6mm 100-grainer will be very similar to the 108. The 100 has the same ogive curve and boat-tail as the 108 but has a shorter OAL and shorter bearing surface (0.368″ vs. 0.409″). A minimum twist rate of 1:8" is recommended for the new 100 — same as for the 108. In a 6BR rifle, the 100-grainer's reduced bearing surface, combined with reduced mass, should enable Berger's new 100gr 6mm bullet to fly <strong>50-70 fps faster</strong> than the 108 (with charges of equal pressure).</p></blockquote><p></p>
[QUOTE="ButterBean, post: 1965560, member: 41385"] Huh, Well why aren't you shooting 100's then? it sure looked like it was shooting those 95's with pinpoint accuracy, and it's no myth 12 twist is to slow for the 95's and up, you can run that in any modern day twist calculator and find the same answer [B]New 100gr 6mm Match Bullet — More Velocity Than 105/108[/B] Long-range benchresters have had great success with the Berger 108gr match bullet, introduced in 2007. Given the popularity of its tangent-ogive 108, Berger has been developing a shorter, lighter version, which can shoot faster than the 108 in small cartridges such as the 6mmBR, 6mmAR (6-6.5 Grendel), and 6 PPC. The new 6mm 100-grainer will be very similar to the 108. The 100 has the same ogive curve and boat-tail as the 108 but has a shorter OAL and shorter bearing surface (0.368″ vs. 0.409″). A minimum twist rate of 1:8” is recommended for the new 100 — same as for the 108. In a 6BR rifle, the 100-grainer’s reduced bearing surface, combined with reduced mass, should enable Berger’s new 100gr 6mm bullet to fly [B]50-70 fps faster[/B] than the 108 (with charges of equal pressure). [/QUOTE]
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Improving a barrel by lapping.
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