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Long Range Hunting & Shooting
False Positive Pressure Signs
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<blockquote data-quote="JTB" data-source="post: 2609114" data-attributes="member: 97196"><p>Another case in point. I also have a premium action that was demonstrating false pressures with heavy bolt lift. After chasing my tail for some time I discovered that the bolt face had not been cut exactly perpendicular to the bolt itself. I chucked it into my lathe and squared the bolt face and it opened as smooth as glass after that. It was distorting the cases when fired against the un-squared bolt face resulting a perceived heavy bolt as it rotated open against the fired-formed and, now, un-square case head. Required a slight chambering adjustment but until then I had never thought to check this. The cases that had been distorted were never the same, even after a second firing against the squared bolt face; ended up tossing them. Lesson learned</p></blockquote><p></p>
[QUOTE="JTB, post: 2609114, member: 97196"] Another case in point. I also have a premium action that was demonstrating false pressures with heavy bolt lift. After chasing my tail for some time I discovered that the bolt face had not been cut exactly perpendicular to the bolt itself. I chucked it into my lathe and squared the bolt face and it opened as smooth as glass after that. It was distorting the cases when fired against the un-squared bolt face resulting a perceived heavy bolt as it rotated open against the fired-formed and, now, un-square case head. Required a slight chambering adjustment but until then I had never thought to check this. The cases that had been distorted were never the same, even after a second firing against the squared bolt face; ended up tossing them. Lesson learned [/QUOTE]
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False Positive Pressure Signs
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