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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bullet Spin and Performance
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<blockquote data-quote="davewilson" data-source="post: 248555" data-attributes="member: 4491"><p>someone earlier said a 10 twist will produce 2 revolutions in a 20" wide animal. at close ranges this would be true but at longer ranges, if the impact velocity is half what it started at, the amount of revolutions would be much closer to 4. the "twist rate" of the bullet actually increases with the range because the rate of spin slows much slower than the velocity.</p><p></p><p>i know of a couple very experienced long range hunters that will not put anything on their guns unless it's an 8 twist barrel. reason being they simply get much better terminal performance from the faster twists. i'm not going to say it's a trend here in Pa. but it's certainly becoming more of an excepted concept.</p><p></p><p>most bullets used for long range hunting are much like varmint bullets. other than the Accubond, the bullets most preferred, Sierra, Berger, A-Max, are thin jackets. i wouldn't call them heavy jackets by any means. long range hunting is like varmint hunting but the impact velocities are 1/2 - 1/3 what varmint bullets are. most everyone i know wants fragmentation of the bullet for a larger wound channel. now i realize that we're shooting everything from coyotes to moose and this creates variables in bullet selection, but, for the most part, people want the bullet to fragment.</p><p></p><p>yes, i think the faster twists help.</p></blockquote><p></p>
[QUOTE="davewilson, post: 248555, member: 4491"] someone earlier said a 10 twist will produce 2 revolutions in a 20" wide animal. at close ranges this would be true but at longer ranges, if the impact velocity is half what it started at, the amount of revolutions would be much closer to 4. the "twist rate" of the bullet actually increases with the range because the rate of spin slows much slower than the velocity. i know of a couple very experienced long range hunters that will not put anything on their guns unless it's an 8 twist barrel. reason being they simply get much better terminal performance from the faster twists. i'm not going to say it's a trend here in Pa. but it's certainly becoming more of an excepted concept. most bullets used for long range hunting are much like varmint bullets. other than the Accubond, the bullets most preferred, Sierra, Berger, A-Max, are thin jackets. i wouldn't call them heavy jackets by any means. long range hunting is like varmint hunting but the impact velocities are 1/2 - 1/3 what varmint bullets are. most everyone i know wants fragmentation of the bullet for a larger wound channel. now i realize that we're shooting everything from coyotes to moose and this creates variables in bullet selection, but, for the most part, people want the bullet to fragment. yes, i think the faster twists help. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bullet Spin and Performance
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