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Rifles, Reloading, Optics, Equipment
Reloading
Case head separation
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<blockquote data-quote="bigedp51" data-source="post: 1296163" data-attributes="member: 28965"><p>Rifle chambers and dies vary in diameter and cartridge headspace length. Sometimes you may need to lap the top of the shell holder and sometimes the die never touches the shell holder for correct shoulder bump. Redding competition shell holders push the case from .002 to .010 "LESS" into the die than a standard shell holder. This is because the deck height of these shell holders are "LOWER" than standard. Another method would be to use feeler gauges between the shell holder and die for less shoulder bump.</p><p></p><p>I have a Lee .223 die if adjusted as you describe above the shoulder would be pushed back .010 to .011 shorter than the chamber headspace.</p><p></p><p>The main reason they say to only bump the shoulder back .001 to .002 is because this is within the elastic limits of the brass. Meaning the brass can stretch to meet the bolt face and then spring back without stressing and thinning the brass.</p></blockquote><p></p>
[QUOTE="bigedp51, post: 1296163, member: 28965"] Rifle chambers and dies vary in diameter and cartridge headspace length. Sometimes you may need to lap the top of the shell holder and sometimes the die never touches the shell holder for correct shoulder bump. Redding competition shell holders push the case from .002 to .010 "LESS" into the die than a standard shell holder. This is because the deck height of these shell holders are "LOWER" than standard. Another method would be to use feeler gauges between the shell holder and die for less shoulder bump. I have a Lee .223 die if adjusted as you describe above the shoulder would be pushed back .010 to .011 shorter than the chamber headspace. The main reason they say to only bump the shoulder back .001 to .002 is because this is within the elastic limits of the brass. Meaning the brass can stretch to meet the bolt face and then spring back without stressing and thinning the brass. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Case head separation
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