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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bullet RPM and performance
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<blockquote data-quote="Greyfox" data-source="post: 2525100" data-attributes="member: 10291"><p>Most of my twist rate observations have been with the 6.5 caliber cartridges using lead core bullets which I have shot most frequently over the past 20 years or so for both competition and hunting with 8.5, 8, and 7.5 test barrels. I don't buy into recent craze to automatically go with fastest twist barrels. You can't over-stabilize a bullet. Alternatively, I don't use bullets that are prone to blow-up due to over-spinning them at very high velocity. My practice is to use the slowest twist that will fully stabilize my bullets(min 150-175SG). I don't simply pick the fastest twist. From my experiences, I seem to get better and more consistent accuracy with less fouling effects at high shot counts with intermediate 8tw barrels using the 140 class, and more recently, even the 156gr bullets(that exhibit a relatively long bearing surface) which stabilize well at my velocity/conditions and perform well on game at distance. I also believe that the faster twist may be harder on the throats.</p></blockquote><p></p>
[QUOTE="Greyfox, post: 2525100, member: 10291"] Most of my twist rate observations have been with the 6.5 caliber cartridges using lead core bullets which I have shot most frequently over the past 20 years or so for both competition and hunting with 8.5, 8, and 7.5 test barrels. I don’t buy into recent craze to automatically go with fastest twist barrels. You can’t over-stabilize a bullet. Alternatively, I don’t use bullets that are prone to blow-up due to over-spinning them at very high velocity. My practice is to use the slowest twist that will fully stabilize my bullets(min 150-175SG). I don’t simply pick the fastest twist. From my experiences, I seem to get better and more consistent accuracy with less fouling effects at high shot counts with intermediate 8tw barrels using the 140 class, and more recently, even the 156gr bullets(that exhibit a relatively long bearing surface) which stabilize well at my velocity/conditions and perform well on game at distance. I also believe that the faster twist may be harder on the throats. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bullet RPM and performance
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