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Rifles, Reloading, Optics, Equipment
Reloading
300 RUM problems
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<blockquote data-quote="Dano1" data-source="post: 251904" data-attributes="member: 14209"><p>I'd also make sure that all brass is trimmed to minimum case length. Brass stretches and that could certainly be one of the problems especially if the brass has had multiple fireings. As far as run out on the cases, that certainly is a possibility, but I've noticed that firing the cases and full length resizing usually straightens out the run out to a managable degree. But I'd look at the expander ball on the die as well. you may need a new resizing asembely (sp) if it's crooked.</p><p> </p><p>Don't sweat the brass on the case heads, I'd really be only concerned if there is an ejectormark on the case head where the brass has flowed into the ejector hole. I have 4 Rem700s and all of them leave brass on the bolt face to some degree. Some are worse than others, but I think it's due to the caliber and larger case head (more friction on fired cases) it's a 7mm Rem Mag Sendero.</p><p> </p><p>If there is brass filings outside of the Chamber, and boltface, as stated earlier, check for sharp edges.</p><p> </p><p>The mark showing up on the bolt (if I'm understanding you correctly) is just behind and in between the lugs on the bolt. If this is the case, then it's being made be the tops of the resesses in the action, they are a little high. This happens occasionally, if it isn't causing problems, I'd not worry about it. I can be addressed by a good gunsmith if you want.</p><p> </p><p>Hope this is helpful,</p><p> </p><p>Dan</p></blockquote><p></p>
[QUOTE="Dano1, post: 251904, member: 14209"] I'd also make sure that all brass is trimmed to minimum case length. Brass stretches and that could certainly be one of the problems especially if the brass has had multiple fireings. As far as run out on the cases, that certainly is a possibility, but I've noticed that firing the cases and full length resizing usually straightens out the run out to a managable degree. But I'd look at the expander ball on the die as well. you may need a new resizing asembely (sp) if it's crooked. Don't sweat the brass on the case heads, I'd really be only concerned if there is an ejectormark on the case head where the brass has flowed into the ejector hole. I have 4 Rem700s and all of them leave brass on the bolt face to some degree. Some are worse than others, but I think it's due to the caliber and larger case head (more friction on fired cases) it's a 7mm Rem Mag Sendero. If there is brass filings outside of the Chamber, and boltface, as stated earlier, check for sharp edges. The mark showing up on the bolt (if I'm understanding you correctly) is just behind and in between the lugs on the bolt. If this is the case, then it's being made be the tops of the resesses in the action, they are a little high. This happens occasionally, if it isn't causing problems, I'd not worry about it. I can be addressed by a good gunsmith if you want. Hope this is helpful, Dan [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
300 RUM problems
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