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Rifles, Reloading, Optics, Equipment
Reloading
bullet seating depth & high pressures
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<blockquote data-quote="woods" data-source="post: 335828" data-attributes="member: 6042"><p>Match grade reamers leave a tight chamber. This brings up 2 other possible explanations:</p><p></p><p>What is the measured OD of a FIRED & UNSIZED case neck. If he reamed a tight neck and your neck brass is too thick then you could have no clearance around the neck in the chamber. That would lead to added pressure. Take a bullet and see if you can insert it down the neck in a fired case.</p><p></p><p>A tight chamber sometimes will not allow your brass to grow large enough so that your die will size the case body. I have a 280AI where the Redding Body Die does not size the case body and I have hard bolt lift after 3 or 4 firings. The body die will push the shoulder back but will not size the case body and it is binding in the chamber. Goes in easy enough because of the taper and the added leverage of pushing the bolt in, but lifting the bolt handle does not provide as much leverage and it binds. This is a minor inconvenience only and not a dangerous situation.</p><p></p><p>Do you have any other pressure signs such as flattened primers or shiny spots on the case head?</p></blockquote><p></p>
[QUOTE="woods, post: 335828, member: 6042"] Match grade reamers leave a tight chamber. This brings up 2 other possible explanations: What is the measured OD of a FIRED & UNSIZED case neck. If he reamed a tight neck and your neck brass is too thick then you could have no clearance around the neck in the chamber. That would lead to added pressure. Take a bullet and see if you can insert it down the neck in a fired case. A tight chamber sometimes will not allow your brass to grow large enough so that your die will size the case body. I have a 280AI where the Redding Body Die does not size the case body and I have hard bolt lift after 3 or 4 firings. The body die will push the shoulder back but will not size the case body and it is binding in the chamber. Goes in easy enough because of the taper and the added leverage of pushing the bolt in, but lifting the bolt handle does not provide as much leverage and it binds. This is a minor inconvenience only and not a dangerous situation. Do you have any other pressure signs such as flattened primers or shiny spots on the case head? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
bullet seating depth & high pressures
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