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The Basics, Starting Out
Measuring shoulder bump with coal vs shoulder comparator
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<blockquote data-quote="VenatusDominus" data-source="post: 2610500" data-attributes="member: 117869"><p>The shoulder can grow like yours did because the die will squeeze the body and the brass will flow toward the shoulder until it meets the resistance of the die, and then flow up the neck. If there is the same bolt resistance with and without the case, then it sounds like you are good. Is this once fired brass? As others on this site have noted, it may take up to 3 or 4 firings of virgin brass to grow it to fully fit the chamber. Hotter loads will obviously grow your brass quicker. Firing pin must be removed or the spring tension will be what you feel, not the brass in the chamber.</p></blockquote><p></p>
[QUOTE="VenatusDominus, post: 2610500, member: 117869"] The shoulder can grow like yours did because the die will squeeze the body and the brass will flow toward the shoulder until it meets the resistance of the die, and then flow up the neck. If there is the same bolt resistance with and without the case, then it sounds like you are good. Is this once fired brass? As others on this site have noted, it may take up to 3 or 4 firings of virgin brass to grow it to fully fit the chamber. Hotter loads will obviously grow your brass quicker. Firing pin must be removed or the spring tension will be what you feel, not the brass in the chamber. [/QUOTE]
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Measuring shoulder bump with coal vs shoulder comparator
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