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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
What factors cause too high pressure ?
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<blockquote data-quote="MagnumManiac" data-source="post: 2837665" data-attributes="member: 10755"><p>Excessive pressure, be it found through conventional load testing or found unexpectedly, is normally caused by an excessive amount of the correct powder, or the use of a wrong powder.</p><p>Other causes, which are not loading technique caused, are tight neck clearance within the chamber, tight bores and rough bores.</p><p>I rarely see excessive pressure over the Pressure Trace II system to show up on the brass and primer until 70,000psi is reached…however, some rifles exhibit other nuances that they only exhibit once excessive pressure, even slightly, is reached. 2 of my Winchester Model 70's exhibit cratered primers once 70,000psi is reached with no stiff bolt lift, no stiff extraction, case swelling or primer flattening. I have other actions that are exact copies that don't do this, Rugers, Kimber's, and CZ actions that don't do it. They do get stiff bolt lift though.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2837665, member: 10755"] Excessive pressure, be it found through conventional load testing or found unexpectedly, is normally caused by an excessive amount of the correct powder, or the use of a wrong powder. Other causes, which are not loading technique caused, are tight neck clearance within the chamber, tight bores and rough bores. I rarely see excessive pressure over the Pressure Trace II system to show up on the brass and primer until 70,000psi is reached…however, some rifles exhibit other nuances that they only exhibit once excessive pressure, even slightly, is reached. 2 of my Winchester Model 70’s exhibit cratered primers once 70,000psi is reached with no stiff bolt lift, no stiff extraction, case swelling or primer flattening. I have other actions that are exact copies that don’t do this, Rugers, Kimber’s, and CZ actions that don’t do it. They do get stiff bolt lift though. Cheers. [/QUOTE]
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What factors cause too high pressure ?
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