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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338-408 chey-tac powders
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<blockquote data-quote="bbw" data-source="post: 486725" data-attributes="member: 27840"><p>OK, no <strong><em>"improvement"</em></strong>. But did you find it worse in any way? Did you measure ES?</p><p></p><p>You say in your test that "As far as matching burn rate perfectly to the case capacity I would say H-50BMG, WC872 or US869 are a bit better choices for the 300 gr SMK, BUT for a much lower pressure load that still offers 3500 fps performance and fine accuracy, 20N29 seems to be as good as any in the 338 Allen Mag."</p><p></p><p>I live in Switzerland and have a 338/408 in the works. The availability of 50BMG powder is not so good here, but VV is easy to find and also cheaper. Additionally, the lower pressure you describe in your test should contribute to better case life. </p><p></p><p>NZ Longranger also indicate potentially better barrel life.</p><p></p><p>So even if VV 20N29 does not provide any improvement on the target, there seems to be advantages as far as pressure, case and barrel life are concerned.... Or am I missing something?</p><p></p><p></p><p></p><p>Link to Kirby's test:</p><p><a href="http://www.longrangehunting.com/forums/f19/338-allen-magnum-vhita-vouri-20n29-velocity-accuracy-test-16943/" target="_blank">http://www.longrangehunting.com/forums/f19/338-allen-magnum-vhita-vouri-20n29-velocity-accuracy-test-16943/</a></p></blockquote><p></p>
[QUOTE="bbw, post: 486725, member: 27840"] OK, no [B][I]"improvement"[/I][/B]. But did you find it worse in any way? Did you measure ES? You say in your test that "As far as matching burn rate perfectly to the case capacity I would say H-50BMG, WC872 or US869 are a bit better choices for the 300 gr SMK, BUT for a much lower pressure load that still offers 3500 fps performance and fine accuracy, 20N29 seems to be as good as any in the 338 Allen Mag." I live in Switzerland and have a 338/408 in the works. The availability of 50BMG powder is not so good here, but VV is easy to find and also cheaper. Additionally, the lower pressure you describe in your test should contribute to better case life. NZ Longranger also indicate potentially better barrel life. So even if VV 20N29 does not provide any improvement on the target, there seems to be advantages as far as pressure, case and barrel life are concerned.... Or am I missing something? Link to Kirby's test: [URL]http://www.longrangehunting.com/forums/f19/338-allen-magnum-vhita-vouri-20n29-velocity-accuracy-test-16943/[/URL] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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338-408 chey-tac powders
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