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Rifles, Reloading, Optics, Equipment
Reloading
To turn or not (necks)
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<blockquote data-quote="woods" data-source="post: 277798" data-attributes="member: 6042"><p>Sizing without the expander will improve runout or concentricity. When you pull the expander back through the neck it can and often does create runout. Also if you size without the expander then you do not have to lube the inside of the neck.</p><p></p><p>When you take the expander out and turn the necks you can take the brass neck thickness down to a specific thickness so that you do not have too much bullet grip. For instance if you have a 30-06 full length die and take the expander out and size the case and the outside of the neck measures .329" and your neck thickness is .014" then the math would be</p><p></p><p>.329" - .014" -.014" = .301"</p><p></p><p>that is too much bullet grip of .308" - .301" = .007"</p><p></p><p>But if you neck turned your brass down to .012" the math would be</p><p></p><p>.329" - .012" -.012" = .305"</p><p></p><p>which is about right for a bullet grip of .308" - .305" = .003"</p><p></p><p>There are ways to minimize the bad effects of the expander but I am no expert in that since I just don't use them.</p></blockquote><p></p>
[QUOTE="woods, post: 277798, member: 6042"] Sizing without the expander will improve runout or concentricity. When you pull the expander back through the neck it can and often does create runout. Also if you size without the expander then you do not have to lube the inside of the neck. When you take the expander out and turn the necks you can take the brass neck thickness down to a specific thickness so that you do not have too much bullet grip. For instance if you have a 30-06 full length die and take the expander out and size the case and the outside of the neck measures .329" and your neck thickness is .014" then the math would be .329" - .014" -.014" = .301" that is too much bullet grip of .308" - .301" = .007" But if you neck turned your brass down to .012" the math would be .329" - .012" -.012" = .305" which is about right for a bullet grip of .308" - .305" = .003" There are ways to minimize the bad effects of the expander but I am no expert in that since I just don't use them. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
To turn or not (necks)
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