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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Independent Study: LRH calibres - 7mm WSM vs 300 RUM vs 338 LM
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<blockquote data-quote="Haagen Dazs" data-source="post: 632846" data-attributes="member: 42602"><p><strong>Re: 338 Norma Mag? How much is too much?</strong></p><p></p><p></p><p></p><p></p><p>7mm WSM 80 gn H2O = 1263 gn/sq in</p><p>338 NM 107 gn H2O = 1193 gn/sq in (6% difference)</p><p></p><p>and for comparison:</p><p></p><p>338 LM 114 gn H2O = 1271 gn/sq in</p><p>308 Win 56 gn H2O = 752 gn/sq in</p><p>300 RUM 110 gn H2O = 1479 gn/sq in</p><p></p><p></p><p></p><p>I always figured a larger bullet moving slower would mean less barrel wear.</p><p></p><p></p><p></p><p><strong><a href="http://www.accurateshooter.com/technical-articles/overbore-cartridges-defined-by-formula/" target="_blank">This aritcle</a></strong> seems as good as any in terms of comparing overbore calibres.</p></blockquote><p></p>
[QUOTE="Haagen Dazs, post: 632846, member: 42602"] [b]Re: 338 Norma Mag? How much is too much?[/b] 7mm WSM 80 gn H2O = 1263 gn/sq in 338 NM 107 gn H2O = 1193 gn/sq in (6% difference) and for comparison: 338 LM 114 gn H2O = 1271 gn/sq in 308 Win 56 gn H2O = 752 gn/sq in 300 RUM 110 gn H2O = 1479 gn/sq in I always figured a larger bullet moving slower would mean less barrel wear. [B][URL="http://www.accurateshooter.com/technical-articles/overbore-cartridges-defined-by-formula/"]This aritcle[/URL][/B] seems as good as any in terms of comparing overbore calibres. [/QUOTE]
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Independent Study: LRH calibres - 7mm WSM vs 300 RUM vs 338 LM
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