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Rifles, Reloading, Optics, Equipment
Reloading
What are the effects of varying base to datum lengths
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<blockquote data-quote="swampbug" data-source="post: 2008042" data-attributes="member: 115992"><p>Once fired brass may or may not have expanded to the full chamber size. Generally not .</p><p>Assuming your .005 spread was caused by some cases being shorter, the above would explain why. New cases are generally shorter and take a couple of firing to expand to a rifles chamber.</p><p>There would not be drastic differences in velocity or accuracy with .005 spread but consistency is the goal.</p><p>A .002 "bump" is what most handloaders use. It provides a good chamber fit and can still easily run the bolt.</p></blockquote><p></p>
[QUOTE="swampbug, post: 2008042, member: 115992"] Once fired brass may or may not have expanded to the full chamber size. Generally not . Assuming your .005 spread was caused by some cases being shorter, the above would explain why. New cases are generally shorter and take a couple of firing to expand to a rifles chamber. There would not be drastic differences in velocity or accuracy with .005 spread but consistency is the goal. A .002 "bump" is what most handloaders use. It provides a good chamber fit and can still easily run the bolt. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
What are the effects of varying base to datum lengths
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