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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Introducing Cutting Edge Bullet's new LAZER high BC copper hunting bullet
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<blockquote data-quote="Michael Courtney" data-source="post: 835010" data-attributes="member: 28191"><p>I seriously doubt that these bullets really have BCs this high. It is very rare for an independent party to measure a G1 BC more than twice the sectional density for any bullet using a velocity loss (two chronograph) or a velocity and time of flight method. The highest BCs of .308 180 grain bullets that have been confirmed by parties independent of the manufacturer are close to 0.500, so the claim of these bullets seems exaggerated. Extraordinary claims should require extraordinary proof. </p><p></p><p>Bullets with cannelures, grooves, or driving bands usually fare even worse, since the driving band or groove sets up a secondary Mach cone/shock wave which increases supersonic drag. Even if the bullets reliably expand down to 1700 fps, 1700 fps will come at a much shorter range if the BC is closer to 0.500.</p></blockquote><p></p>
[QUOTE="Michael Courtney, post: 835010, member: 28191"] I seriously doubt that these bullets really have BCs this high. It is very rare for an independent party to measure a G1 BC more than twice the sectional density for any bullet using a velocity loss (two chronograph) or a velocity and time of flight method. The highest BCs of .308 180 grain bullets that have been confirmed by parties independent of the manufacturer are close to 0.500, so the claim of these bullets seems exaggerated. Extraordinary claims should require extraordinary proof. Bullets with cannelures, grooves, or driving bands usually fare even worse, since the driving band or groove sets up a secondary Mach cone/shock wave which increases supersonic drag. Even if the bullets reliably expand down to 1700 fps, 1700 fps will come at a much shorter range if the BC is closer to 0.500. [/QUOTE]
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Introducing Cutting Edge Bullet's new LAZER high BC copper hunting bullet
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