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Rifles, Reloading, Optics, Equipment
Reloading
Peterson Brass
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<blockquote data-quote="Mike Matteson" data-source="post: 3027593" data-attributes="member: 101791"><p>I changed to neck sizing belted mag over 25yrs or so. Improve my case life for about 3 firing to lost primer pocket after 10 to 12 firing. </p><p>In all the reading here I learn that shoulder bumping was the way to go. Only resetting the shoulder back .001 to .003" after each firing. That cut down the working of the case and stop of lot of case stretch at the base. Other things is fireforming your cases. First time extending the bullet into the lands to push the case base back against the bolt face. That way it force the shoulder to move froward not at the case base. Becareful of on your powder load. Not to create hight chamber pressures. </p><p>What Peterson came out with is a major sept forward for belted may cases. If you are trying to size for a different chamber just size the neck down to the caliber. Also look at your reloading manuals to compare one belted mag case from base to shoulder, and to the neck. Besure that there isn't a differents. Otherwise a little more work maybe required to size the case.</p></blockquote><p></p>
[QUOTE="Mike Matteson, post: 3027593, member: 101791"] I changed to neck sizing belted mag over 25yrs or so. Improve my case life for about 3 firing to lost primer pocket after 10 to 12 firing. In all the reading here I learn that shoulder bumping was the way to go. Only resetting the shoulder back .001 to .003" after each firing. That cut down the working of the case and stop of lot of case stretch at the base. Other things is fireforming your cases. First time extending the bullet into the lands to push the case base back against the bolt face. That way it force the shoulder to move froward not at the case base. Becareful of on your powder load. Not to create hight chamber pressures. What Peterson came out with is a major sept forward for belted may cases. If you are trying to size for a different chamber just size the neck down to the caliber. Also look at your reloading manuals to compare one belted mag case from base to shoulder, and to the neck. Besure that there isn't a differents. Otherwise a little more work maybe required to size the case. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Peterson Brass
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