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Hunting
Long Range Hunting & Shooting
7mm Rem mag 168gr or even 180Gr tumble and inaccuracy with 8 twist barrel?
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<blockquote data-quote="CMDR Kibo" data-source="post: 1627040" data-attributes="member: 106095"><p>OP - As others have already stated, this instability and lack of accuracy you refer to in the article is counterintuitive and counterfactual. Here's the link to Berger's twist rate stability calculator for you to use: <a href="https://bergerbullets.com/twist-rate-calculator/" target="_blank">https://bergerbullets.com/twist-rate-calculator/</a>. </p><p></p><p>I put in the bullet weights you mentioned and none of them produced an unstable result. I used very conservative muzzle velocities also. Go ahead and try for yourself. </p><p></p><p>Also, if you look at manufacturers like Browning for example, they are producing their long range versions of the X-Bolt Pro and X-Bolt Hell's Canyon with 1:8 twists specifically for the heavier/longer and better BC bullets available now. You can see this on pages 49, 51 and 52 of their 2019 catalog. </p><p></p><p>Personally, I shoot the 7mm RM a lot and I have no problem stabilizing the bullets you mention. I have both a 1:9.5 twist barrel and a 1:8 twist barrel for the heavier/longer bullets past 160 gr.</p></blockquote><p></p>
[QUOTE="CMDR Kibo, post: 1627040, member: 106095"] OP - As others have already stated, this instability and lack of accuracy you refer to in the article is counterintuitive and counterfactual. Here's the link to Berger's twist rate stability calculator for you to use: [URL]https://bergerbullets.com/twist-rate-calculator/[/URL]. I put in the bullet weights you mentioned and none of them produced an unstable result. I used very conservative muzzle velocities also. Go ahead and try for yourself. Also, if you look at manufacturers like Browning for example, they are producing their long range versions of the X-Bolt Pro and X-Bolt Hell's Canyon with 1:8 twists specifically for the heavier/longer and better BC bullets available now. You can see this on pages 49, 51 and 52 of their 2019 catalog. Personally, I shoot the 7mm RM a lot and I have no problem stabilizing the bullets you mention. I have both a 1:9.5 twist barrel and a 1:8 twist barrel for the heavier/longer bullets past 160 gr. [/QUOTE]
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7mm Rem mag 168gr or even 180Gr tumble and inaccuracy with 8 twist barrel?
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