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The Range
Ammo & Reloading
Testing three .308's with the same load
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<blockquote data-quote="diggler1833" data-source="post: 3737019" data-attributes="member: 48072"><p>My bet is Varget, all day every day. Not only is it resistant to temp swings (anywhere from only .16 - .4 FPS/degree), but it doesn't take a stroke of luck to reach low ES and SD.</p><p></p><p>For comparison, the charts that I have show CFE-223 being about 1.7 FPS/degree...that's an 85 FPS swing from shooting in 35 and 85 degree weather.</p><p></p><p>On your CZ test it looks like you had an ES of 94, and an SD of 32.41. AR was ES = 38, SD =13.83, and Ruger was ES = 66, SD = 22.84. Ball powders are pretty hard to get low ES/SD. Often you have to run it up to the ragged edge of pressure to get those numbers as low as they'll go. </p><p></p><p>Sorry...I nerd out on this stuff a bit.</p></blockquote><p></p>
[QUOTE="diggler1833, post: 3737019, member: 48072"] My bet is Varget, all day every day. Not only is it resistant to temp swings (anywhere from only .16 - .4 FPS/degree), but it doesn't take a stroke of luck to reach low ES and SD. For comparison, the charts that I have show CFE-223 being about 1.7 FPS/degree...that's an 85 FPS swing from shooting in 35 and 85 degree weather. On your CZ test it looks like you had an ES of 94, and an SD of 32.41. AR was ES = 38, SD =13.83, and Ruger was ES = 66, SD = 22.84. Ball powders are pretty hard to get low ES/SD. Often you have to run it up to the ragged edge of pressure to get those numbers as low as they'll go. Sorry...I nerd out on this stuff a bit. [/QUOTE]
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Testing three .308's with the same load
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