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Rifles, Reloading, Optics, Equipment
Reloading
Dents/Crimp on shoulder cause?
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<blockquote data-quote="MNbogboy" data-source="post: 1820395" data-attributes="member: 18849"><p>Another test you might do is to try and chamber one of the fired cases (wipe it clean first - no oil). If it chambers normally or maybe a little stiff then remove it and completely color it with a "sharpie". Chamber it again, open close the bolt a couple of times, remove it and see if the Sharpie had been rubbed off on most areas and "corners" of the shoulder area.</p><p>If it appears that it was fireformed in that chamber it will probably be obvious by the wear marks on the coloring.</p><p></p><p>Clean and lube the same case. Remove the decapper/expander from the die. Back the die out about one full turn from touching the shell holder. Run the case into the die a little at a time (1/16th turn) until resistance is felt. Try it in the chamber again. Cases normally get longer as they are squeezed in a die. It may now NOT fit. Run the case into the die about 1/16 turn per try until the case does fit. At this point you are close (one direction or the other).</p><p>Obviously if the case dents reappear before the case fits then there is a problem between the chamber/die pair. If not, fine tuning can be done to your "bump" length (another search for you). </p><p>Note: if all works after you reinstall the decapper/expander on the RCBS die there may also be a little more adjustment required for desirable case fit.</p><p></p><p>Hope you gain progress on this problem,</p><p>Randy</p></blockquote><p></p>
[QUOTE="MNbogboy, post: 1820395, member: 18849"] Another test you might do is to try and chamber one of the fired cases (wipe it clean first - no oil). If it chambers normally or maybe a little stiff then remove it and completely color it with a "sharpie". Chamber it again, open close the bolt a couple of times, remove it and see if the Sharpie had been rubbed off on most areas and "corners" of the shoulder area. If it appears that it was fireformed in that chamber it will probably be obvious by the wear marks on the coloring. Clean and lube the same case. Remove the decapper/expander from the die. Back the die out about one full turn from touching the shell holder. Run the case into the die a little at a time (1/16th turn) until resistance is felt. Try it in the chamber again. Cases normally get longer as they are squeezed in a die. It may now NOT fit. Run the case into the die about 1/16 turn per try until the case does fit. At this point you are close (one direction or the other). Obviously if the case dents reappear before the case fits then there is a problem between the chamber/die pair. If not, fine tuning can be done to your "bump" length (another search for you). Note: if all works after you reinstall the decapper/expander on the RCBS die there may also be a little more adjustment required for desirable case fit. Hope you gain progress on this problem, Randy [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Dents/Crimp on shoulder cause?
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