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Rifles, Reloading, Optics, Equipment
Reloading
Load work up...seating depth test first OR charge weight first?
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<blockquote data-quote="Mike 338" data-source="post: 1400987" data-attributes="member: 41338"><p>I guess I'll buck the trend. Seating depth. Although VLD bullets exposed the fallacy of "close to the lands is most accurate" rule, it can and does apply to any bullet although I don't much mess around with seating depth on pistol or lever-action calibers.</p><ol> <li data-xf-list-type="ol">Find the maximum charge with bullets about .020" off the lands. A chronograph can be helpful here as sometimes you should stop even though signs of pressure aren't evident. I just use one shot for each charge weight. <br /> </li> <li data-xf-list-type="ol">Throw a powder charge about 1-1/2% <strong>below max</strong> for the next step.<br /> </li> <li data-xf-list-type="ol">Do a "rough" seating depth test in 30 thousandths increments, starting at .010" off the lands. .010", .040", .070", .100", .130" jump. Like coop2564 said, if your magazine length limits how long your bullet can be, than that's you longest bullet seating depth unless you don't want to use the magazine and go single-shot rifle, which is fine too. Start with the longest bullets first and watch for signs of pressure as seating depth does definitely affect pressure on both short seating depths and long depths. Don't get skimpy on shots here. Shoot 5 or 6 shots per group to get some real data. Don't waste you time if your just going to use 3 shot groups. <br /> </li> <li data-xf-list-type="ol">After you find which one groups best, use that rough seating depth and workup you powder charges.</li> <li data-xf-list-type="ol">"Fine tune" seating depth and powder charges but you probably won't need to.</li> </ol></blockquote><p></p>
[QUOTE="Mike 338, post: 1400987, member: 41338"] I guess I'll buck the trend. Seating depth. Although VLD bullets exposed the fallacy of "close to the lands is most accurate" rule, it can and does apply to any bullet although I don't much mess around with seating depth on pistol or lever-action calibers. [LIST=1] [*]Find the maximum charge with bullets about .020" off the lands. A chronograph can be helpful here as sometimes you should stop even though signs of pressure aren't evident. I just use one shot for each charge weight. [*]Throw a powder charge about 1-1/2% [B]below max[/B] for the next step. [*]Do a "rough" seating depth test in 30 thousandths increments, starting at .010" off the lands. .010", .040", .070", .100", .130" jump. Like coop2564 said, if your magazine length limits how long your bullet can be, than that's you longest bullet seating depth unless you don't want to use the magazine and go single-shot rifle, which is fine too. Start with the longest bullets first and watch for signs of pressure as seating depth does definitely affect pressure on both short seating depths and long depths. Don't get skimpy on shots here. Shoot 5 or 6 shots per group to get some real data. Don't waste you time if your just going to use 3 shot groups. [*]After you find which one groups best, use that rough seating depth and workup you powder charges. [*]"Fine tune" seating depth and powder charges but you probably won't need to. [/LIST] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Load work up...seating depth test first OR charge weight first?
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