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Rifles, Reloading, Optics, Equipment
Reloading
Neck size tension?
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<blockquote data-quote="bigedp51" data-source="post: 1358448" data-attributes="member: 28965"><p>Redding tells you to reduce the neck diameter .002 to allow for brass spring back after sizing.</p><p>At the Whidden custom die website they sell expander kits for their standard dies. The expander kits contain 5 expanders from bullet diameter to .004 under bullet diameter.</p><p>I have read that competitive shooters like David Tubbs is using .002 to .003 neck tension.</p><p>Also if the necks are not annealed and become work hardened you will have "more" brass spring back and reducing the neck tension.</p><p>And bushing dies work best with neck turned brass and the expander is supplied with the Redding dies for those who do not neck turn.</p><p></p><p>Bottom line there are many variables on what bushing size to use with "your" brass.</p><p></p><p>Many competitive AR15 shooters use a Lyman type "M" expander on their progressive presses.</p><p></p><p>Below you can see the main part of the expander is .003 smaller than bullet diameter. The case mouth is just barely bumped onto the larger .226 diameter part of the expander to aid seating and reduce neck runout.</p><p></p><p><img src="https://i.imgur.com/ohIUcpd.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>If you wet tumble or any other type case cleaning that removes the carbon from the inside of the case neck I would recommend replacing the missing carbon.</p><p></p><p>Dipping your case necks in graphite powder which is nothing more than finely ground carbon will replace any missing carbon from any cleaning. It will also greatly reduce seating effort decreasing any chance of inducing neck runout with tighter case necks.</p><p></p><p><img src="https://i.imgur.com/CH3epH9.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="bigedp51, post: 1358448, member: 28965"] Redding tells you to reduce the neck diameter .002 to allow for brass spring back after sizing. At the Whidden custom die website they sell expander kits for their standard dies. The expander kits contain 5 expanders from bullet diameter to .004 under bullet diameter. I have read that competitive shooters like David Tubbs is using .002 to .003 neck tension. Also if the necks are not annealed and become work hardened you will have "more" brass spring back and reducing the neck tension. And bushing dies work best with neck turned brass and the expander is supplied with the Redding dies for those who do not neck turn. Bottom line there are many variables on what bushing size to use with "your" brass. Many competitive AR15 shooters use a Lyman type "M" expander on their progressive presses. Below you can see the main part of the expander is .003 smaller than bullet diameter. The case mouth is just barely bumped onto the larger .226 diameter part of the expander to aid seating and reduce neck runout. [IMG]https://i.imgur.com/ohIUcpd.png[/IMG] If you wet tumble or any other type case cleaning that removes the carbon from the inside of the case neck I would recommend replacing the missing carbon. Dipping your case necks in graphite powder which is nothing more than finely ground carbon will replace any missing carbon from any cleaning. It will also greatly reduce seating effort decreasing any chance of inducing neck runout with tighter case necks. [IMG]https://i.imgur.com/CH3epH9.jpg[/IMG] [/QUOTE]
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Neck size tension?
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