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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
How to check a Chronograph?
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<blockquote data-quote="Michael Courtney" data-source="post: 566111" data-attributes="member: 28191"><p>You need an independent way to know the bullet velocity. We usually use multiple chronographs in most situations. I also published an acoustic method a few years ago that will work:</p><p></p><p><a href="http://http//arxiv.org/ftp/arxiv/papers/0812/0812.4752.pdf" target="_blank">http://http://arxiv.org/ftp/arxiv/papers/0812/0812.4752.pdf</a></p><p></p><p>I've also got a few loads that I've used for many years that have a well known velocity and standard deviation in a given rifle. I'd steer away from factory ammo unless its velocity has been verified in the same rifle, because I've seen too many loads 200-300 fps difference from the factory claim.</p></blockquote><p></p>
[QUOTE="Michael Courtney, post: 566111, member: 28191"] You need an independent way to know the bullet velocity. We usually use multiple chronographs in most situations. I also published an acoustic method a few years ago that will work: [URL="http://http//arxiv.org/ftp/arxiv/papers/0812/0812.4752.pdf"]http://http://arxiv.org/ftp/arxiv/papers/0812/0812.4752.pdf[/URL] I've also got a few loads that I've used for many years that have a well known velocity and standard deviation in a given rifle. I'd steer away from factory ammo unless its velocity has been verified in the same rifle, because I've seen too many loads 200-300 fps difference from the factory claim. [/QUOTE]
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How to check a Chronograph?
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