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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7 RUM hard on barrels?
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<blockquote data-quote="JeffVN" data-source="post: 251402" data-attributes="member: 2261"><p>I am shooting a 7WSM - which has slightly less case capacity than the 7RemMag (81 grains vs 83), and I have no trouble (in Las Vegas in the summer) getting the berger 180s to 2,940 fps with a 28" 1:9 twist Kreiger barrel. I see no reason to step up to the RUM if your goal is 3,000 fps or slower with the Berger 180s. If the goal is 3,100+ then you'll need the additional boiler room in the RUM.</p><p></p><p>I also see no reason to use anything faster in twist than a 1:9. my 1:9 twist works fine for the Berger 180s and 175 smks at 2,800 fps. That was my velocity with a summer load out of my 7WSM in Houston with a 26" barrel and an OAL of 2.90".</p><p></p><p>check out this page:</p><p></p><p><a href="http://www.6mmbr.citymaker.com/7mm284.html" target="_blank">7mm Cartridge Guide</a></p><p></p><p>Jeffvn</p></blockquote><p></p>
[QUOTE="JeffVN, post: 251402, member: 2261"] I am shooting a 7WSM - which has slightly less case capacity than the 7RemMag (81 grains vs 83), and I have no trouble (in Las Vegas in the summer) getting the berger 180s to 2,940 fps with a 28" 1:9 twist Kreiger barrel. I see no reason to step up to the RUM if your goal is 3,000 fps or slower with the Berger 180s. If the goal is 3,100+ then you'll need the additional boiler room in the RUM. I also see no reason to use anything faster in twist than a 1:9. my 1:9 twist works fine for the Berger 180s and 175 smks at 2,800 fps. That was my velocity with a summer load out of my 7WSM in Houston with a 26" barrel and an OAL of 2.90". check out this page: [url=http://www.6mmbr.citymaker.com/7mm284.html]7mm Cartridge Guide[/url] Jeffvn [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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7 RUM hard on barrels?
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