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Rifles, Reloading, Optics, Equipment
Reloading
runout created by bullet seating
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<blockquote data-quote="bigedp51" data-source="post: 1637315" data-attributes="member: 28965"><p>The Redding bushing die FAQ tell you if the neck thickness varies .002 or more to use the expander that comes with the bushing die. You will need a bushing .002 smaller when using the expander. Meaning push the neck irregularities to the outside of the neck.</p><p></p><p>When using a bushing die without the expander a uniform case neck will have very low case neck runout and very low bullet runout. A non-uniform case neck will have very low case neck runout BUT bullet runout will be higher. Meaning the seated bullet will not be centered with the center line of the case body and have increased bullet runout.</p><p></p><p><img src="https://i.imgur.com/NlyA8oI.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>I use Forster full length non-bushing dies with the expander and then subtract the neck thickness variations from the case neck runout after sizing.</p><p></p><p>Bottom line, if you do not neck turn you are better off using a standard die with a expander.</p><p></p><p>Many reloaders use a body die and the Lee collet neck sizing die because the get less runout than with bushing dies. I prefer the Forster full length benchrest dies with their high mounted floating expander that greatly reduces neck runout. And I also use the Forster inline benchrest seating dies.</p><p></p><p><img src="https://i.imgur.com/Y7Iyv8o.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="https://i.imgur.com/MomXeUI.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>I use the Redding neck thickness gauge below to sort brass if not neck turning. And as a example if the case has .003 neck thickness variations I subtract that from my total case neck runout after sizing. After loading and bullet seating I want the bullet runout to be as close as possible to what the corrected case neck runout was.</p><p></p><p><img src="https://i.imgur.com/blZCE83.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="bigedp51, post: 1637315, member: 28965"] The Redding bushing die FAQ tell you if the neck thickness varies .002 or more to use the expander that comes with the bushing die. You will need a bushing .002 smaller when using the expander. Meaning push the neck irregularities to the outside of the neck. When using a bushing die without the expander a uniform case neck will have very low case neck runout and very low bullet runout. A non-uniform case neck will have very low case neck runout BUT bullet runout will be higher. Meaning the seated bullet will not be centered with the center line of the case body and have increased bullet runout. [IMG]https://i.imgur.com/NlyA8oI.png[/IMG] I use Forster full length non-bushing dies with the expander and then subtract the neck thickness variations from the case neck runout after sizing. Bottom line, if you do not neck turn you are better off using a standard die with a expander. Many reloaders use a body die and the Lee collet neck sizing die because the get less runout than with bushing dies. I prefer the Forster full length benchrest dies with their high mounted floating expander that greatly reduces neck runout. And I also use the Forster inline benchrest seating dies. [IMG]https://i.imgur.com/Y7Iyv8o.jpg[/IMG] [IMG]https://i.imgur.com/MomXeUI.gif[/IMG] I use the Redding neck thickness gauge below to sort brass if not neck turning. And as a example if the case has .003 neck thickness variations I subtract that from my total case neck runout after sizing. After loading and bullet seating I want the bullet runout to be as close as possible to what the corrected case neck runout was. [IMG]https://i.imgur.com/blZCE83.jpg[/IMG] [/QUOTE]
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Reloading
runout created by bullet seating
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