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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: 2167626" data-attributes="member: 10755"><p>With everything that's been said about the 7's bucking the wind better over a 30.</p><p>Most are comparing similar bullet weights, 175's/180's is about max in a standard 7 twist of 9.25 or so.</p><p>Max bullet weight in a 10" twist 30 is a 230gr without drama.</p><p>Which has the higher BC?</p><p>The difference between a 180g 30 and a 180g 7 is barely anything in the real world, maybe an INCH difference on target.</p><p>I get the love for 7's, I now own one, but to be honest, the LR game starts at 338 and goes up.</p><p>I know my 338-416 Rigby Improved is miles ahead of any 6.5/7/30 in spades of energy and less drop and wind drift.</p><p>My 264WM shoots a little flatter than my 300WM, but my 7STW is a little flatter than both with the RIGHT bullet, twist is the determining factor here.</p><p>If your rifle hasn't got a fast enough twist, then it's not in contention.</p><p>I am only now seeing the light, I won't change my 10 twist 30's, there's no need, but I have gone 7" on a 22-250AI, 9" twist 338's, 8" twist 6.5's, 9" twist 270 and a 10" twist 375. Even my 505 Gibbs had a 10" twist.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2167626, member: 10755"] With everything that’s been said about the 7’s bucking the wind better over a 30. Most are comparing similar bullet weights, 175’s/180’s is about max in a standard 7 twist of 9.25 or so. Max bullet weight in a 10” twist 30 is a 230gr without drama. Which has the higher BC? The difference between a 180g 30 and a 180g 7 is barely anything in the real world, maybe an INCH difference on target. I get the love for 7’s, I now own one, but to be honest, the LR game starts at 338 and goes up. I know my 338-416 Rigby Improved is miles ahead of any 6.5/7/30 in spades of energy and less drop and wind drift. My 264WM shoots a little flatter than my 300WM, but my 7STW is a little flatter than both with the RIGHT bullet, twist is the determining factor here. If your rifle hasn’t got a fast enough twist, then it’s not in contention. I am only now seeing the light, I won’t change my 10 twist 30’s, there’s no need, but I have gone 7” on a 22-250AI, 9” twist 338’s, 8” twist 6.5’s, 9” twist 270 and a 10” twist 375. Even my 505 Gibbs had a 10” twist. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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7mm or 30 cal? Just for curiosity’s sake
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