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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Twist Rate???
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<blockquote data-quote="BountyHunter" data-source="post: 273059" data-attributes="member: 12"><p>1-11s in the 300 WSM are setting the house afire all the time with 210s</p><p> </p><p>Only reason seirra lists the 240 at 1-9 is because it was developed for LR NRA shooters (actually Army MTU tested them) shooting med velocity as a replacement for the old 250 years ago. They needed the extra twist for the lower velocities. Step up the MV and shoots great in 1-10.</p><p> </p><p>187 grainers are being shot in record groups out of 1-13 and 1-14 in the 300 Ack Imp all the time.</p><p> </p><p>Needed twist can be adjusted up or down by MV. 300 Weatheby has zero problems hammering 240s in little tight groups out of 1-10. </p><p> </p><p>Do not fall trap to assuming all 30 calibers shoot best with a 1-10, when in reality you have to be a little smarter than that and figure the expected MV into the equation.</p><p> </p><p>BH</p></blockquote><p></p>
[QUOTE="BountyHunter, post: 273059, member: 12"] 1-11s in the 300 WSM are setting the house afire all the time with 210s Only reason seirra lists the 240 at 1-9 is because it was developed for LR NRA shooters (actually Army MTU tested them) shooting med velocity as a replacement for the old 250 years ago. They needed the extra twist for the lower velocities. Step up the MV and shoots great in 1-10. 187 grainers are being shot in record groups out of 1-13 and 1-14 in the 300 Ack Imp all the time. Needed twist can be adjusted up or down by MV. 300 Weatheby has zero problems hammering 240s in little tight groups out of 1-10. Do not fall trap to assuming all 30 calibers shoot best with a 1-10, when in reality you have to be a little smarter than that and figure the expected MV into the equation. BH [/QUOTE]
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Twist Rate???
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