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Extreme Long Range Hunting & Shooting (ELR)
New ELR bullet testing
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<blockquote data-quote="noel carlson" data-source="post: 927254" data-attributes="member: 16138"><p>ELR Researcher,</p><p></p><p>"What twist rates do these bullets require to keep them stable?"...</p><p></p><p>The ZA338 used in this test is compatible with standard bore/groove dimensions, and is a two year old design that will never be publicly released. Therefore; in a strict sense, the specific answer to your question has no consumer utility. However; within a generalized context, a 16-18 caliber exit-twist will stabilize any 6.4 caliber ZA projectile regardless of diameter (the bracket spread is to accommodate a variable Reynolds number). I hesitate to dwell on that piece of information due to the fact that I am actually using a 14 caliber exit twist-rate rifling geometry in a proprietary bore/groove dimension. There are reasons for this that go beyond projectile stabilization, and focus upon drag reduction. The engraving bands require full effacement to achieve potential aeroballistic efficiency.</p></blockquote><p></p>
[QUOTE="noel carlson, post: 927254, member: 16138"] ELR Researcher, "What twist rates do these bullets require to keep them stable?"... The ZA338 used in this test is compatible with standard bore/groove dimensions, and is a two year old design that will never be publicly released. Therefore; in a strict sense, the specific answer to your question has no consumer utility. However; within a generalized context, a 16-18 caliber exit-twist will stabilize any 6.4 caliber ZA projectile regardless of diameter (the bracket spread is to accommodate a variable Reynolds number). I hesitate to dwell on that piece of information due to the fact that I am actually using a 14 caliber exit twist-rate rifling geometry in a proprietary bore/groove dimension. There are reasons for this that go beyond projectile stabilization, and focus upon drag reduction. The engraving bands require full effacement to achieve potential aeroballistic efficiency. [/QUOTE]
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New ELR bullet testing
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