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Rifles, Reloading, Optics, Equipment
Gunsmithing
700 Bolt Extraction Problem
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<blockquote data-quote="tobnpr" data-source="post: 2237176" data-attributes="member: 68758"><p>Well, yes you should...</p><p>But the cause(s) for failure to extract could be different if it occurs only with a fired case.</p><p>It's a matter of determining when- and why- the extractor is losing it's grip on the case.</p><p></p><p>If the round seats on the boltface, and you can place the bolt into battery, and then eject successfully without firing- it's not the extractor as it's gripping the case and doing its job.</p><p></p><p>Primary extraction only comes into play on a fired case, where it is relied upon to break the case free from the chamber walls.</p><p>You don't need the mechanical advantage provided by the primary extraction cam, if the case hasn't been fired and expanded...</p></blockquote><p></p>
[QUOTE="tobnpr, post: 2237176, member: 68758"] Well, yes you should... But the cause(s) for failure to extract could be different if it occurs only with a fired case. It's a matter of determining when- and why- the extractor is losing it's grip on the case. If the round seats on the boltface, and you can place the bolt into battery, and then eject successfully without firing- it's not the extractor as it's gripping the case and doing its job. Primary extraction only comes into play on a fired case, where it is relied upon to break the case free from the chamber walls. You don't need the mechanical advantage provided by the primary extraction cam, if the case hasn't been fired and expanded... [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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700 Bolt Extraction Problem
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