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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.308 Project -seeking advice-
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<blockquote data-quote="bowhunthard88" data-source="post: 412358" data-attributes="member: 12575"><p>I agree with everything trebark said, except for this. I agree that any bullet under 175 gr. will stabilize in a 1:11" twist, that said, a 168 gr. will stabilize in a 1:12" twist. If you are going to shoot bullets that are heavier than 175 gr. go with a 1:10" twist, you will still be able to shoot the lighter bullets. With the average bullet 1:11" twist will be fine, but not for the heavier ones.</p><p></p><p>At 100 yds. a 1:12" twist will stabilize a 178 gr. enough for awesome accuracy (0.089" - actual personal experience), but @ 450 yds. the group was opening up to about 8.5". I switched to 168 gr. bullets (same type/brand of bullet), and groups are slightly under an inch @ same range. I guess you'll also have to take into account how far out you want to stabilize the weight bullet you want to shoot.</p><p></p><p>The Hornady 178 gr. A-MAX box states that it takes a 1:10" twist to stabilize them correctly. Twist being a function of stabilization, length plays a big part as well as weight.</p></blockquote><p></p>
[QUOTE="bowhunthard88, post: 412358, member: 12575"] I agree with everything trebark said, except for this. I agree that any bullet under 175 gr. will stabilize in a 1:11" twist, that said, a 168 gr. will stabilize in a 1:12" twist. If you are going to shoot bullets that are heavier than 175 gr. go with a 1:10" twist, you will still be able to shoot the lighter bullets. With the average bullet 1:11" twist will be fine, but not for the heavier ones. At 100 yds. a 1:12" twist will stabilize a 178 gr. enough for awesome accuracy (0.089" - actual personal experience), but @ 450 yds. the group was opening up to about 8.5". I switched to 168 gr. bullets (same type/brand of bullet), and groups are slightly under an inch @ same range. I guess you'll also have to take into account how far out you want to stabilize the weight bullet you want to shoot. The Hornady 178 gr. A-MAX box states that it takes a 1:10" twist to stabilize them correctly. Twist being a function of stabilization, length plays a big part as well as weight. [/QUOTE]
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Rifles, Bullets, Barrels & Ballistics
.308 Project -seeking advice-
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