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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Questions for S1, brass preparation?
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<blockquote data-quote="Guest" data-source="post: 24713"><p>Howdy 308 </p><p></p><p>It is true that each rifle is a unique story, we have great luck with non tightnecked chambers by only sizing 80 percent of the neck, and turning those necks. The comments below apply to Lapua and every other type of brass I have ever seen. </p><p> </p><p>I will list the stuff I do in the order of typical importance, grant me that lots of brass vary in quality on a number of points and your lot may have bad wall thickness consistency, where my lot may have poor depth consistency of primer pockets.</p><p> </p><p>Everything we do to a piece of brass affects at least one of these 3 things: concentricity, consistency, pressure curve. </p><p> </p><p>1) Uniform the DEPTH of the primer pocket. </p><p> </p><p>2) Turn the neck to a consistent wall thickness. </p><p> </p><p>3) Sort by weight and then by volume. </p><p> </p><p>4) Now sort by wall thickness variance on the case body .500" above the head.</p><p> </p><p>5) Ream the flash hole from the outside to the desired diameter, also centering it in the primer pocket. </p><p> </p><p>6) Fire form, trim to uniform length, and double check for weight variance, culling the few oddballs in weight after uniforming their length. </p><p> </p><p>7) Seat bullets with a low mechanical advantage press and cull any rounds that the neck tension does not feel identical. </p><p> </p><p>8) Spin rounds on a runout device to check for body to neck concentricity, and ogive to body concentricity. </p><p> </p><p>308- There are a couple of other important steps I will have to e-mail you.... I won't be able to post them until STL_Shooter comes down from his high horse.... <img src="http://images/icons/grin.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </p><p></p><p>Just kidding, that about covers it for us. <img src="http://images/icons/smile.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>[ 01-06-2003: Message edited by: S1 ]</p><p></p><p>[ 01-06-2003: Message edited by: S1 ]</p></blockquote><p></p>
[QUOTE="Guest, post: 24713"] Howdy 308 It is true that each rifle is a unique story, we have great luck with non tightnecked chambers by only sizing 80 percent of the neck, and turning those necks. The comments below apply to Lapua and every other type of brass I have ever seen. I will list the stuff I do in the order of typical importance, grant me that lots of brass vary in quality on a number of points and your lot may have bad wall thickness consistency, where my lot may have poor depth consistency of primer pockets. Everything we do to a piece of brass affects at least one of these 3 things: concentricity, consistency, pressure curve. 1) Uniform the DEPTH of the primer pocket. 2) Turn the neck to a consistent wall thickness. 3) Sort by weight and then by volume. 4) Now sort by wall thickness variance on the case body .500" above the head. 5) Ream the flash hole from the outside to the desired diameter, also centering it in the primer pocket. 6) Fire form, trim to uniform length, and double check for weight variance, culling the few oddballs in weight after uniforming their length. 7) Seat bullets with a low mechanical advantage press and cull any rounds that the neck tension does not feel identical. 8) Spin rounds on a runout device to check for body to neck concentricity, and ogive to body concentricity. 308- There are a couple of other important steps I will have to e-mail you.... I won't be able to post them until STL_Shooter comes down from his high horse.... [img]images/icons/grin.gif[/img] Just kidding, that about covers it for us. [img]images/icons/smile.gif[/img] [ 01-06-2003: Message edited by: S1 ] [ 01-06-2003: Message edited by: S1 ] [/QUOTE]
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Questions for S1, brass preparation?
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