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Rifles, Reloading, Optics, Equipment
Reloading
Need help with pressure problems
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<blockquote data-quote="lancetkenyon" data-source="post: 1412445" data-attributes="member: 68875"><p>Measure headspace from new to fired case (base to shoulder using a .420 headspace gauge in a Hornady comparator set). I bet there is a big difference in new to fired, meaning a headspace issue. Also, when you resized the brass, how much did you bump back the shoulder? I know, belter magnums seat off the belt, but you still can have headspace issues if you are bumping the shoulder too far back. I just did load development for a Rem Sendero in .264WM. The new Nosler brass was about .020" shorter headspace than fired and showed slight signs of pressure after the first firing. I bumped the shoulder .002", and the same charge weights were smooth and no pressure signs. It was also a 1:9" twist as RockyMtnMT suggested, so I skipped the 140s and shot a 130 VLD in it into the mid .2s. </p><p></p><p>Plus, I hate Hornady brass. It sucks. </p><p></p><p>My cousin also bought a Sendero in .300RUM, and extraction was an issue, no matter how light of a load. Had a smith replace the extractor which is just pinned in, and viola', extraction issue was gone.</p></blockquote><p></p>
[QUOTE="lancetkenyon, post: 1412445, member: 68875"] Measure headspace from new to fired case (base to shoulder using a .420 headspace gauge in a Hornady comparator set). I bet there is a big difference in new to fired, meaning a headspace issue. Also, when you resized the brass, how much did you bump back the shoulder? I know, belter magnums seat off the belt, but you still can have headspace issues if you are bumping the shoulder too far back. I just did load development for a Rem Sendero in .264WM. The new Nosler brass was about .020" shorter headspace than fired and showed slight signs of pressure after the first firing. I bumped the shoulder .002", and the same charge weights were smooth and no pressure signs. It was also a 1:9" twist as RockyMtnMT suggested, so I skipped the 140s and shot a 130 VLD in it into the mid .2s. Plus, I hate Hornady brass. It sucks. My cousin also bought a Sendero in .300RUM, and extraction was an issue, no matter how light of a load. Had a smith replace the extractor which is just pinned in, and viola', extraction issue was gone. [/QUOTE]
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Need help with pressure problems
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