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Rifles, Reloading, Optics, Equipment
Reloading
Major runout with 280AI my thoughts?
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<blockquote data-quote="Canadian Bushman" data-source="post: 1006315" data-attributes="member: 41122"><p>First things first, you need to narrow down the part of your process that is causing the runout.</p><p></p><p>Probably gonna be either sizing down, expanding, or seating.</p><p></p><p>A few things to consider</p><p></p><p>When you check a neck, then press a bullet in and check the bullet your projecting the tolerance away from the datum, or the point the case is supported. </p><p>If the neck measures .002 and the ogive of the bullet measures .006 it may have been there before you seated the bullet. </p><p></p><p>Your brass should be near perfect when extracted from the chamber as long as you extract them softly. Dont rip back on that bolt and bash the neck into something or you have no baseline. </p><p></p><p>Bad brass with uneven thickness will always run out, nothing you can do will fix this.</p></blockquote><p></p>
[QUOTE="Canadian Bushman, post: 1006315, member: 41122"] First things first, you need to narrow down the part of your process that is causing the runout. Probably gonna be either sizing down, expanding, or seating. A few things to consider When you check a neck, then press a bullet in and check the bullet your projecting the tolerance away from the datum, or the point the case is supported. If the neck measures .002 and the ogive of the bullet measures .006 it may have been there before you seated the bullet. Your brass should be near perfect when extracted from the chamber as long as you extract them softly. Dont rip back on that bolt and bash the neck into something or you have no baseline. Bad brass with uneven thickness will always run out, nothing you can do will fix this. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Major runout with 280AI my thoughts?
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