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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7mm or 30 cal? Just for curiosity’s sake
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<blockquote data-quote="MagnumManiac" data-source="post: 2178663" data-attributes="member: 10755"><p>The only part of this debate that's stays constant is Sectional Density.</p><p>BC is not constant. Twist rate and Velocity play a part in final BC.</p><p>Even though I voted 30, my all time favourite cal is, and always has been, 6.5mm. Cut my LR teeth with a 6.5x55 Swede on a sporter Mauser 96. We shot comps at 300/400/500/600 every second Saturday. That rifle, with it's Carl Gustav 4 groove 1:7.25" twist was exceptionally accurate.</p><p>Anyway, the BC out of a 30-06 is different than it is out of a 30-378 Bee. Period.</p><p>If you think this statement is false, then shoot the SAME bullets 400fps faster/slower and tell me what the dopes work out to be.</p><p>BC's quoted are given that number in a velocity window, go above or below that window and the BC changes.</p><p>This is why many believe Nosler had it wrong for so many years, they didn't, it was just their velocity window was higher than most mainstream cartridges produced.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2178663, member: 10755"] The only part of this debate that’s stays constant is Sectional Density. BC is not constant. Twist rate and Velocity play a part in final BC. Even though I voted 30, my all time favourite cal is, and always has been, 6.5mm. Cut my LR teeth with a 6.5x55 Swede on a sporter Mauser 96. We shot comps at 300/400/500/600 every second Saturday. That rifle, with it’s Carl Gustav 4 groove 1:7.25” twist was exceptionally accurate. Anyway, the BC out of a 30-06 is different than it is out of a 30-378 Bee. Period. If you think this statement is false, then shoot the SAME bullets 400fps faster/slower and tell me what the dopes work out to be. BC’s quoted are given that number in a velocity window, go above or below that window and the BC changes. This is why many believe Nosler had it wrong for so many years, they didn’t, it was just their velocity window was higher than most mainstream cartridges produced. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7mm or 30 cal? Just for curiosity’s sake
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