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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
New .338 lanches a 300gr Sierra MK at 3500fps?
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<blockquote data-quote="royinidaho" data-source="post: 883705" data-attributes="member: 2011"><p>Well whatdathinkaboutthat?</p><p></p><p>I may have for once in my life guessed right. I'm liking my 375 AM.</p><p></p><p>Kirby, if you look at this. . . </p><p></p><p>With 142.2 grains of Retumbo and seating depth exactly as you set it, from the loaded rounds I received, I'm getting slight extractor marks on about 50% of the cases with 1 case giving just a titch of bolt lift pressure.</p><p></p><p>Also last summer one primer blew. Haven't reloaded that case yet so I have no idea of primer pocket expansion. However, the ejector mark is solid. I can easily feel it with a finger nail.</p><p></p><p>I'm backing her down a grain as I don't think effectiveness of that big sucker will suffer much.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>Temps were summer time temps for the bit heavier extractor mark. Temp lately has been around 30 and getting a few shiny marks on only some cases.</p><p></p><p>You definitely done good on this one!</p></blockquote><p></p>
[QUOTE="royinidaho, post: 883705, member: 2011"] Well whatdathinkaboutthat? I may have for once in my life guessed right. I'm liking my 375 AM. Kirby, if you look at this. . . With 142.2 grains of Retumbo and seating depth exactly as you set it, from the loaded rounds I received, I'm getting slight extractor marks on about 50% of the cases with 1 case giving just a titch of bolt lift pressure. Also last summer one primer blew. Haven't reloaded that case yet so I have no idea of primer pocket expansion. However, the ejector mark is solid. I can easily feel it with a finger nail. I'm backing her down a grain as I don't think effectiveness of that big sucker will suffer much.:) Temps were summer time temps for the bit heavier extractor mark. Temp lately has been around 30 and getting a few shiny marks on only some cases. You definitely done good on this one! [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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New .338 lanches a 300gr Sierra MK at 3500fps?
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