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Rifles, Reloading, Optics, Equipment
Reloading
forester decapping unit in rcbs die ?
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<blockquote data-quote="CatShooter" data-source="post: 1301523" data-attributes="member: 7"><p>Den... do you have a 7mm Mauser, or a 7mm Express, or a 7mm Remington Magnum (it does make a difference)!! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>When you are asking for help, P-L-E-A-S-E give accurate information.</p><p></p><p>OK...</p><p>" I did no prep it grew about .017 on the shoulder the first firing with searching internet threads apparently this is about right for a belted magnum on the first [firing].</p><p></p><p>On the first firing of a belted case, measuring the "shoulder growth"" is useless.</p><p></p><p>A standard beltless/rimless case (like a 30-06) will grow on the first firing (and subsequent firings) because the case walls stick to the chamber walls, and the case head is blown back to the bolt face.</p><p>So, if the shoulder is moved forward, that comes from the case stretching in front of the case head (the "web). The case is longer, and if you measure the case length (from head to mouth) it will be the same amount longer.</p><p></p><p>But the belted case is restrained by the belt, and the fitment in the little space in the rear of the chamber.</p><p></p><p>The most headspace (minimum case belt, maximum chamber belt space) you will see in well made rifles is less than 10-ish thou....</p><p></p><p>My 264 Win Mag has 6 thou of "headspace", but on the first firing, shoulder blows forward 32 thou, but the case length does not grow - they stay the same. After that, on subsequent firings and loadings, they do not grow at all.</p><p></p><p>You need to take control of your case growth and case life. Learn to adjust your dies so the cases don't grow.</p></blockquote><p></p>
[QUOTE="CatShooter, post: 1301523, member: 7"] Den... do you have a 7mm Mauser, or a 7mm Express, or a 7mm Remington Magnum (it does make a difference)!! :) When you are asking for help, P-L-E-A-S-E give accurate information. OK... " I did no prep it grew about .017 on the shoulder the first firing with searching internet threads apparently this is about right for a belted magnum on the first [firing]. On the first firing of a belted case, measuring the "shoulder growth"" is useless. A standard beltless/rimless case (like a 30-06) will grow on the first firing (and subsequent firings) because the case walls stick to the chamber walls, and the case head is blown back to the bolt face. So, if the shoulder is moved forward, that comes from the case stretching in front of the case head (the "web). The case is longer, and if you measure the case length (from head to mouth) it will be the same amount longer. But the belted case is restrained by the belt, and the fitment in the little space in the rear of the chamber. The most headspace (minimum case belt, maximum chamber belt space) you will see in well made rifles is less than 10-ish thou.... My 264 Win Mag has 6 thou of "headspace", but on the first firing, shoulder blows forward 32 thou, but the case length does not grow - they stay the same. After that, on subsequent firings and loadings, they do not grow at all. You need to take control of your case growth and case life. Learn to adjust your dies so the cases don't grow. [/QUOTE]
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Reloading
forester decapping unit in rcbs die ?
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