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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
1 in 7.5 Twist 257 Weatherby
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<blockquote data-quote="Mike Matteson" data-source="post: 1989993" data-attributes="member: 101791"><p>Berger Bullet's has a stability analysis calculator to determine twist rates. Just how good this is I don't really know, but I don't think they would put something out that incorrect either. It could be only for their bullets too. I've been looking at twist rates for a 6mm AI or along that line of thinking. The only different is I am looking at 105 grs to 115 gr bullets to shoot only. Bartlein builds barrels with twist rates that start out in the chamber at one rate and continues to increase as it reaches the muzzle. In my mind that see to work out, by lowering the chamber pressure at the start by not having a high rate of twist to start with. Achieving the twist rate at the muzzle or withing a few inches of the muzzle. I am looking at a rifle to shot out to 700yds, and not for elk either. Achieving velocity or about 3200 fps at muzzle with at 1-7 twist. Looking for input.</p></blockquote><p></p>
[QUOTE="Mike Matteson, post: 1989993, member: 101791"] Berger Bullet's has a stability analysis calculator to determine twist rates. Just how good this is I don't really know, but I don't think they would put something out that incorrect either. It could be only for their bullets too. I've been looking at twist rates for a 6mm AI or along that line of thinking. The only different is I am looking at 105 grs to 115 gr bullets to shoot only. Bartlein builds barrels with twist rates that start out in the chamber at one rate and continues to increase as it reaches the muzzle. In my mind that see to work out, by lowering the chamber pressure at the start by not having a high rate of twist to start with. Achieving the twist rate at the muzzle or withing a few inches of the muzzle. I am looking at a rifle to shot out to 700yds, and not for elk either. Achieving velocity or about 3200 fps at muzzle with at 1-7 twist. Looking for input. [/QUOTE]
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1 in 7.5 Twist 257 Weatherby
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