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Rifles, Reloading, Optics, Equipment
Reloading
Who has used the RCBS neck sizing dies to bump shoulders on 7mm rem mag?
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<blockquote data-quote="Gene" data-source="post: 542081" data-attributes="member: 7402"><p>Again, you cannot use a neck size only die to bump the shoulder. The Redding body die, or any F/L die, is what you need. When chambering a round, if the bolt goes down with a great deal of effort, it means the shoulder has expanded excessively, and its time to bump it back a tiny bit, usually .001" or .002" is enough. You need a caliper and devise to fit over half the shoulder to measure how far down you are bumping. You can find these in the Sinclair catalog. Turn the die down about 1/32" at a time, measure, and try in your rifle. Keep doing this until bolt closes with just a very slight resistance. If bolt flops down, you pushed the shoulder back too far. This creates excessive headspace. I throw those cases away. Many will shoot them to move the shoulder out again, but that is risky.</p></blockquote><p></p>
[QUOTE="Gene, post: 542081, member: 7402"] Again, you cannot use a neck size only die to bump the shoulder. The Redding body die, or any F/L die, is what you need. When chambering a round, if the bolt goes down with a great deal of effort, it means the shoulder has expanded excessively, and its time to bump it back a tiny bit, usually .001" or .002" is enough. You need a caliper and devise to fit over half the shoulder to measure how far down you are bumping. You can find these in the Sinclair catalog. Turn the die down about 1/32" at a time, measure, and try in your rifle. Keep doing this until bolt closes with just a very slight resistance. If bolt flops down, you pushed the shoulder back too far. This creates excessive headspace. I throw those cases away. Many will shoot them to move the shoulder out again, but that is risky. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Who has used the RCBS neck sizing dies to bump shoulders on 7mm rem mag?
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