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Long Range Hunting & Shooting
Some guidance so I don't blow myself up...
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<blockquote data-quote="MontanaRifleman" data-source="post: 327455" data-attributes="member: 11717"><p>What Tank said is right but I'll expand a little. Pressure signs usally include sticky bolt, excessively flattened and/or cratered primers and ejector marks. Ejector marks are a shiney spot near the edge of the case made by the ejector in your bolt face. You can see these signs individually or in any combination. You can also see these signs without excessive pressure, i.e., a sticky bolt can be caused by a dirty chamber or dirty brass or overswelled case. If you're working up a load and your bolt has been functioning smoothly and all of a sudden it gets sticky, it's a good bet that your getting over pressure. Usually a combination of these signs is a good indicator of over pressure. Recognizing pressure signs is fairly straight forward and you get a better feel for it with experience. Also, different rifles with and different bullet/powder combinations may show different pressure signs. Pressuer signs can also be caused by other factors like cleaning residue or lube in your bore. This happened to me recently while I was treating my bore with a product that required "wet" firing it. </p><p> </p><p>Enlarged primer pockets are a definite sign of pressure. If you're primers seat with little or no force, your pockets are getting enlarged and time to think about backing off.</p><p> </p><p>Hope that helps,</p><p> </p><p>Mark</p></blockquote><p></p>
[QUOTE="MontanaRifleman, post: 327455, member: 11717"] What Tank said is right but I'll expand a little. Pressure signs usally include sticky bolt, excessively flattened and/or cratered primers and ejector marks. Ejector marks are a shiney spot near the edge of the case made by the ejector in your bolt face. You can see these signs individually or in any combination. You can also see these signs without excessive pressure, i.e., a sticky bolt can be caused by a dirty chamber or dirty brass or overswelled case. If you're working up a load and your bolt has been functioning smoothly and all of a sudden it gets sticky, it's a good bet that your getting over pressure. Usually a combination of these signs is a good indicator of over pressure. Recognizing pressure signs is fairly straight forward and you get a better feel for it with experience. Also, different rifles with and different bullet/powder combinations may show different pressure signs. Pressuer signs can also be caused by other factors like cleaning residue or lube in your bore. This happened to me recently while I was treating my bore with a product that required "wet" firing it. Enlarged primer pockets are a definite sign of pressure. If you're primers seat with little or no force, your pockets are getting enlarged and time to think about backing off. Hope that helps, Mark [/QUOTE]
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Some guidance so I don't blow myself up...
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