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308 vs 270
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<blockquote data-quote="winmag" data-source="post: 605619" data-attributes="member: 22166"><p>I'd leave the 308 alone, & use your .270 for that range. High S.D., & better B.C. Bullets equals better penetration, more energy, & less wind drift. Is use a MINIMUM of a 140 Accubond, a 150 Innerbonds, or a 160 Partition.</p><p>I'm a 30 cal freak, but my minimum elk round starts at 270 & goes up from there. Anything a 308 can do, an -06 can do better, & the 270, & -06 have the same parent case, thus the above advise.</p><p></p><p>Quick comparison (SAAMI MAX LOADS- Hornady 7th edition)</p><p>308-150gr- about 2700ish fps. BC-.415/SD-.226-.233</p><p>270-150gr- about 2800ish fps. BC- .525/SD-.279</p><p>Run that on JBM Ballistics calculator, out to 1k & you'll see what I mean</p><p>Look where you cross over the 1500 ft lbs/1800 fps mark(for full expansion of a tough bullet).</p><p>The 308 will do it, but of the 2 rifles mentioned, why not use the rifle with superior ballistics, & energy for Elk at longer ranges?</p><p>Just an opinion from an Elk hunter</p></blockquote><p></p>
[QUOTE="winmag, post: 605619, member: 22166"] I'd leave the 308 alone, & use your .270 for that range. High S.D., & better B.C. Bullets equals better penetration, more energy, & less wind drift. Is use a MINIMUM of a 140 Accubond, a 150 Innerbonds, or a 160 Partition. I'm a 30 cal freak, but my minimum elk round starts at 270 & goes up from there. Anything a 308 can do, an -06 can do better, & the 270, & -06 have the same parent case, thus the above advise. Quick comparison (SAAMI MAX LOADS- Hornady 7th edition) 308-150gr- about 2700ish fps. BC-.415/SD-.226-.233 270-150gr- about 2800ish fps. BC- .525/SD-.279 Run that on JBM Ballistics calculator, out to 1k & you'll see what I mean Look where you cross over the 1500 ft lbs/1800 fps mark(for full expansion of a tough bullet). The 308 will do it, but of the 2 rifles mentioned, why not use the rifle with superior ballistics, & energy for Elk at longer ranges? Just an opinion from an Elk hunter [/QUOTE]
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