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Old January 26, 2020, 05:21 PM   #266
stagpanther
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Join Date: March 2, 2014
Posts: 7,447
It's not a mystery--SAAMI specs as submitted by winchester specify a max headspace of 1.720. If the top of your case head will not be supported by the chamber--you are tossing the dice.
Quote:
Wow... I was hoping (though not really expecting) things would turn out different as I still like the idea of that cartridge.
I'm guessing this problem has already been accounted for by most gun manufacturers--but as with other intros there might still be some components out there that fall to the max end of specs.
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