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Rifles, Reloading, Optics, Equipment
Reloading
Flatning Primers and Blowing out Primers
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<blockquote data-quote="SBruce" data-source="post: 458248" data-attributes="member: 21068"><p>Have you chrono'd the loads?</p><p> </p><p>What bullet weight/powder type and charge?</p><p> </p><p>What brand of primer?</p><p> </p><p>Do you know for sure the primer pockets of the case are not enlarged?</p><p> </p><p>Are your cases FL sized to the extent that they are actually moving forward at the strike of the fireing pin.?? Sometimes that can be the case even when loads aren't too hot. Excessive headspace in the chamber can account for this. Also, FL sizeing as per the die instructions can do this; especially when the chamber is a little long or large.</p><p> </p><p>The pin strikes, driving the case as far forward in the chamber as it can go. Then the bullet is no longer .010 from the lands. The pressure tries to blow the primer back (and actually does) because the case head is no longer butted up against the boltface. When the pressure forces the case rearward enough to seat the primer again, it's already been flattened.</p><p> </p><p>I can't say if that is the case in your particular situation, but I've seen it happen.</p></blockquote><p></p>
[QUOTE="SBruce, post: 458248, member: 21068"] Have you chrono'd the loads? What bullet weight/powder type and charge? What brand of primer? Do you know for sure the primer pockets of the case are not enlarged? Are your cases FL sized to the extent that they are actually moving forward at the strike of the fireing pin.?? Sometimes that can be the case even when loads aren't too hot. Excessive headspace in the chamber can account for this. Also, FL sizeing as per the die instructions can do this; especially when the chamber is a little long or large. The pin strikes, driving the case as far forward in the chamber as it can go. Then the bullet is no longer .010 from the lands. The pressure tries to blow the primer back (and actually does) because the case head is no longer butted up against the boltface. When the pressure forces the case rearward enough to seat the primer again, it's already been flattened. I can't say if that is the case in your particular situation, but I've seen it happen. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Flatning Primers and Blowing out Primers
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