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measuring cases to .0001

 
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  #22  
Old 04-02-2012, 12:12 PM
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Re: measuring cases to .0001

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Originally Posted by SidecarFlip View Post
All this gives me a headache in as much as production tolerance on die sets, chambers and brass is typically 0.001. and oftentimes much more......

If the initial parameter is 0.001, it's basically impossible to improve on that without spending some serious cash on the constants, chamber, die sets and brass.
That's why I said that .0005" is about as good as it gets. But somebody wanted to know how to consistently measure down to one ten thousandth of an inch. In my book it's not practical, and over the top. I can usually hold my cases within a .00075" window without doing too much effort, and that's more than I need to worry about.
gary
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  #23  
Old 04-02-2012, 12:24 PM
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Re: measuring cases to .0001

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Originally Posted by SidecarFlip View Post
...production tolerance on die sets, chambers and brass is typically 0.001. and oftentimes much more.......
SAAMI specs' tolerances on diameters are typically -.008" on cartridge cases and +.002" on chambers. That insures the fattest case will fit into the skinniest chamber for a given cartridge.
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