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Hunting
Long Range Hunting & Shooting
6.5 284 vs 260 ai
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<blockquote data-quote="Greyfox" data-source="post: 1395941" data-attributes="member: 10291"><p>I wouldn't consider myself an expert and probably will be chastised for my position, but simply declaring that everyone should simply buy a fast twist(7)barrel may not be the no-brainer that many are implying. Yes, the heavies(155) do require a faster twist if that makes sense for your use. Push a faster 130/140 gr bullet into that faster twist barrel at higher velocity and depending on the bullet construction there be a negative effect on accuracy and throat wear. There is a reason that Benchrest shooters pick the slowest twist they can get away with while still stabilizing the bullet. It takes a longer time in the barrel with more energy for a bullet to take a bite into the rifling of a fast twist barrel. The fouling produced in this process can be an issue effecting accuracy and throat erosion, thus the principle behind Bartliens gain twist barrels. With LR hunting as my primary objective, until I understand the terminal performance on game of the heavies, I'll stick with. 1:8 twist. "Pinpoint" accuracy with the resultant precise bullet placement with well proven bullets is what makes the 6.5x284/260AK so effective as a LRH cartridge. I wouldn't want to trade that off until the terminal performance(and BC) of the heavies are understood. Unlike the long/heavy high BC 30 caliber bullets that have more mass and frontal area, the 6.5's rely heavily on the bullets ability to shed energy in the animal. I'll be quick to jump on the fast twist "bandwagon" IF the 6.5 heavies perform well on game.</p><p>The opinion of an old fart!</p></blockquote><p></p>
[QUOTE="Greyfox, post: 1395941, member: 10291"] I wouldn’t consider myself an expert and probably will be chastised for my position, but simply declaring that everyone should simply buy a fast twist(7)barrel may not be the no-brainer that many are implying. Yes, the heavies(155) do require a faster twist if that makes sense for your use. Push a faster 130/140 gr bullet into that faster twist barrel at higher velocity and depending on the bullet construction there be a negative effect on accuracy and throat wear. There is a reason that Benchrest shooters pick the slowest twist they can get away with while still stabilizing the bullet. It takes a longer time in the barrel with more energy for a bullet to take a bite into the rifling of a fast twist barrel. The fouling produced in this process can be an issue effecting accuracy and throat erosion, thus the principle behind Bartliens gain twist barrels. With LR hunting as my primary objective, until I understand the terminal performance on game of the heavies, I’ll stick with. 1:8 twist. “Pinpoint” accuracy with the resultant precise bullet placement with well proven bullets is what makes the 6.5x284/260AK so effective as a LRH cartridge. I wouldn’t want to trade that off until the terminal performance(and BC) of the heavies are understood. Unlike the long/heavy high BC 30 caliber bullets that have more mass and frontal area, the 6.5’s rely heavily on the bullets ability to shed energy in the animal. I’ll be quick to jump on the fast twist “bandwagon” IF the 6.5 heavies perform well on game. The opinion of an old fart! [/QUOTE]
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6.5 284 vs 260 ai
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