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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Rem 700 action how much chamber pressure is safe?
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<blockquote data-quote="Bart B" data-source="post: 269340" data-attributes="member: 5302"><p>I don't think it's safe to load or use ammo with peak pressures getting even close to the action's limit. The reason is the case is weaker than the action and it'll have problems long before the action does. I read some years ago that the Rem. 7XX actions were good for about 130,000 to 140,000 pounds psi (impulse pressure, when fired) before bolt lug setback started.</p><p></p><p>Cartridge brass starts to extrude at about 75,000 pounds psi (about 65,000 cup). If the case head starts extruding back into bolt face cut-outs, I think one has two choices:</p><p></p><p>* Reduce the load (less powder, lighter bullet, etc.) and shoot safe.</p><p></p><p>* Satisfy your egos and use that load (or a heavier one) and shoot happily and dangerously.</p><p></p><p>Therefore, I think one should limit chamber pressure to what the case safely allows, not what the action does.</p></blockquote><p></p>
[QUOTE="Bart B, post: 269340, member: 5302"] I don't think it's safe to load or use ammo with peak pressures getting even close to the action's limit. The reason is the case is weaker than the action and it'll have problems long before the action does. I read some years ago that the Rem. 7XX actions were good for about 130,000 to 140,000 pounds psi (impulse pressure, when fired) before bolt lug setback started. Cartridge brass starts to extrude at about 75,000 pounds psi (about 65,000 cup). If the case head starts extruding back into bolt face cut-outs, I think one has two choices: * Reduce the load (less powder, lighter bullet, etc.) and shoot safe. * Satisfy your egos and use that load (or a heavier one) and shoot happily and dangerously. Therefore, I think one should limit chamber pressure to what the case safely allows, not what the action does. [/QUOTE]
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Rem 700 action how much chamber pressure is safe?
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