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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Long range bullet for 308win
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<blockquote data-quote="MontanaMarine" data-source="post: 229411" data-attributes="member: 268"><p>I think their are a couple things working here.</p><p></p><p>First, the .648 BC of the bullet is quite good, so it really retains velocity.</p><p></p><p>Second, the relatively heavy mass of 208 gr (as compared to say 168-175 gr) retains rotational velocity very well too.</p><p></p><p>The 1/12 twist is not my pick, but in pushing the limits of the factory issue barrel, I discovered it can do things I would have previously considered impossible.</p><p></p><p>The 308 with 1/12 twist has a history of letting 168s go sideways at 1000 yards, so common logic would dictate a 200+ gr bullet is out of the question. But when you look at the low BC, and low mass of a 168, it's not so hard to deduce that it loses both forward velocity and rotational velocity significantly faster than the 208.</p></blockquote><p></p>
[QUOTE="MontanaMarine, post: 229411, member: 268"] I think their are a couple things working here. First, the .648 BC of the bullet is quite good, so it really retains velocity. Second, the relatively heavy mass of 208 gr (as compared to say 168-175 gr) retains rotational velocity very well too. The 1/12 twist is not my pick, but in pushing the limits of the factory issue barrel, I discovered it can do things I would have previously considered impossible. The 308 with 1/12 twist has a history of letting 168s go sideways at 1000 yards, so common logic would dictate a 200+ gr bullet is out of the question. But when you look at the low BC, and low mass of a 168, it's not so hard to deduce that it loses both forward velocity and rotational velocity significantly faster than the 208. [/QUOTE]
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Long range bullet for 308win
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