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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Twist Rate for 300gr SMK's in 338/300 RUM?
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<blockquote data-quote="Don - In Idaho" data-source="post: 93251" data-attributes="member: 4760"><p><strong>Re: Twist Rate for 300gr SMK\'s in 338/300 RUM?</strong></p><p></p><p>I am not saying that I think that a normal pressure load is going to fail in a Rem 700 or a Savage small thread action chambered in 338 LM but the facts are clear as I understand them, that it is without question less than a 100% setup safety wise.</p><p></p><p>The Savage testing giving below 100% safety margin with the WSM's had absolutely nothing to do with lug strength, but rather chamber wall thickness. It is in marginal territory with the WSM and even more so with the Lapua. Remington barrel shanks are thinner than Savages behind the shoulder and thus would be more prone to failure than the Savage barrel in that area. I have also talked to some smiths who are seeing chamber wall stress cracking in Rem 700's chambered in WSMs and will not install WSM barrels on them. Since the Lapua Mag has even thinner walls, I just don't want to go there myself. </p><p></p><p>Based on that knowlege, I won't be chambering any 700's or small thread Savages in 338 Lapua.</p></blockquote><p></p>
[QUOTE="Don - In Idaho, post: 93251, member: 4760"] [b]Re: Twist Rate for 300gr SMK\'s in 338/300 RUM?[/b] I am not saying that I think that a normal pressure load is going to fail in a Rem 700 or a Savage small thread action chambered in 338 LM but the facts are clear as I understand them, that it is without question less than a 100% setup safety wise. The Savage testing giving below 100% safety margin with the WSM's had absolutely nothing to do with lug strength, but rather chamber wall thickness. It is in marginal territory with the WSM and even more so with the Lapua. Remington barrel shanks are thinner than Savages behind the shoulder and thus would be more prone to failure than the Savage barrel in that area. I have also talked to some smiths who are seeing chamber wall stress cracking in Rem 700's chambered in WSMs and will not install WSM barrels on them. Since the Lapua Mag has even thinner walls, I just don't want to go there myself. Based on that knowlege, I won't be chambering any 700's or small thread Savages in 338 Lapua. [/QUOTE]
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Twist Rate for 300gr SMK's in 338/300 RUM?
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