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Rifles, Reloading, Optics, Equipment
Reloading
excess pressure?
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<blockquote data-quote="boomtube" data-source="post: 611120" data-attributes="member: 9215"><p>I've reloading for a very long time and usually load pretty 'hot' but have never blown up anything nor had a head seperation. Some things I've learned about pressure are:</p><p> </p><p>* primers are such poor indicators of pressure I hardly pay them any attention. Excessively flat primers are most often a sign the case shoulders have been set back too far. Pierced primers most often signify a bad firing pin or one that's too small for the bolt hole. Primers that blow out at the edge of the pocket usually have defective cups OR the hole's radius is too large.</p><p> </p><p>* ANY visable sign of high pressure on the case head is too hot, it takes a <u>lot </u>of pressure to make even a faint impression at the ejector/extractor location. </p><p> </p><p>* Any measureable expansion of the head diameter just forward of the extractor groove says the load is too hot.</p><p> </p><p>* A case with no obvious sign of over pressure but the primer pockets get looser each firing IS over loaded.</p><p> </p><p> </p><p>There's no magic 'back off' number for the charge; back off until you're consistantly below where the signs appear.</p></blockquote><p></p>
[QUOTE="boomtube, post: 611120, member: 9215"] I've reloading for a very long time and usually load pretty 'hot' but have never blown up anything nor had a head seperation. Some things I've learned about pressure are: * primers are such poor indicators of pressure I hardly pay them any attention. Excessively flat primers are most often a sign the case shoulders have been set back too far. Pierced primers most often signify a bad firing pin or one that's too small for the bolt hole. Primers that blow out at the edge of the pocket usually have defective cups OR the hole's radius is too large. * ANY visable sign of high pressure on the case head is too hot, it takes a [U]lot [/U]of pressure to make even a faint impression at the ejector/extractor location. * Any measureable expansion of the head diameter just forward of the extractor groove says the load is too hot. * A case with no obvious sign of over pressure but the primer pockets get looser each firing IS over loaded. There's no magic 'back off' number for the charge; back off until you're consistantly below where the signs appear. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
excess pressure?
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