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Rifles, Reloading, Optics, Equipment
Gunsmithing
headspace
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<blockquote data-quote="shortgrass" data-source="post: 2313219" data-attributes="member: 24284"><p>In my mind, headspace is gauging the length of the chamber from datum to bolt face. Thanks to the internet "headspace" now means 2 different things, one of which is not correct. Cartridge fit is not headspace. Only the distance from datum to bolt face is. Brass is not made to the same tolerances that hardened steel gauges are. Brass is malleable, it can be shaped easily. Upon firing the brass 'swells' to me the chamber walls and when pressure drops, it contracts. Any material that can move that much is not a "gauge".</p></blockquote><p></p>
[QUOTE="shortgrass, post: 2313219, member: 24284"] In my mind, headspace is gauging the length of the chamber from datum to bolt face. Thanks to the internet "headspace" now means 2 different things, one of which is not correct. Cartridge fit is not headspace. Only the distance from datum to bolt face is. Brass is not made to the same tolerances that hardened steel gauges are. Brass is malleable, it can be shaped easily. Upon firing the brass 'swells' to me the chamber walls and when pressure drops, it contracts. Any material that can move that much is not a "gauge". [/QUOTE]
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