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Rifles, Reloading, Optics, Equipment
Equipment Discussions
Custom/semi-custom
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<blockquote data-quote="Slick8" data-source="post: 2709357" data-attributes="member: 52585"><p>If you look at the chart I published on post 28 you'll see an impact velocity of 1794 at an altitudeof 630 asl. Most manufacturers state 1800 for minimum impact velocity for reliable expansion. IMO, this number is more important than energy when shooting heavy for caliber vlds as they have such high SD.</p><p></p><p>I personally have an minimum impact velocity threshold of 2000 for an additional margin of error on cup and core bullets.</p><p></p><p>If you take that cart on post 28 from 630 elevation to 8000 asl your numbers will go up at 1k.</p><p></p><p>I still feel that's a tall order to think the prc will get a 175 to a mv of 3000 in a 20 inch barrel.</p><p></p><p>[ATTACH=full]425980[/ATTACH]</p></blockquote><p></p>
[QUOTE="Slick8, post: 2709357, member: 52585"] If you look at the chart I published on post 28 you'll see an impact velocity of 1794 at an altitudeof 630 asl. Most manufacturers state 1800 for minimum impact velocity for reliable expansion. IMO, this number is more important than energy when shooting heavy for caliber vlds as they have such high SD. I personally have an minimum impact velocity threshold of 2000 for an additional margin of error on cup and core bullets. If you take that cart on post 28 from 630 elevation to 8000 asl your numbers will go up at 1k. I still feel that's a tall order to think the prc will get a 175 to a mv of 3000 in a 20 inch barrel. [ATTACH type="full"]425980[/ATTACH] [/QUOTE]
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