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Rifles, Reloading, Optics, Equipment
Reloading
Reloaded seating depth test....
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<blockquote data-quote="Mikecr" data-source="post: 1940351" data-attributes="member: 1521"><p>You won't learn much unless you actually start over.</p><p>By this I mean that you have to do seating testing independent of your powder node, so that you're not ALSO seeing a collapse of powder node(messing with seating results). I would drop powder by a full grain for the seating testing.</p><p>Might be a good time to do primer swapping as well.</p><p></p><p>While so far away from a powder node your grouping will be worse. That's great, the worse the better.</p><p>With this, you'll more easily see at least improvements -from seating alone.</p><p></p><p>Then with best primer, best coarse seating, and fully fire-formed to stable cases, increment back up to a <u>new</u> best powder load. If load density isn't good with best powder load, note muzzle velocity, adjust neck tension<strong>*</strong> and run powder testing again until your best load also fills the case (but not compressed).</p><p>Then fine tweak seating in a narrow window for tightest group shaping.</p><p></p><p><strong>*</strong>With partial sized necks, tension is not interference fit. It's sized spring back(~1thou max) grip, against seated bullet bearing. So you adjust this tension through sizing LENGTH. Force X Area</p><p>If FL sizing necks then forget any tension adjustment as an option. It's already extreme and varying a great deal due to donut and base-bearing junction binding. You could try bigger/smaller bushings, but the first adjustment of consistent value would be to stop FL sizing necks.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1940351, member: 1521"] You won't learn much unless you actually start over. By this I mean that you have to do seating testing independent of your powder node, so that you're not ALSO seeing a collapse of powder node(messing with seating results). I would drop powder by a full grain for the seating testing. Might be a good time to do primer swapping as well. While so far away from a powder node your grouping will be worse. That's great, the worse the better. With this, you'll more easily see at least improvements -from seating alone. Then with best primer, best coarse seating, and fully fire-formed to stable cases, increment back up to a [U]new[/U] best powder load. If load density isn't good with best powder load, note muzzle velocity, adjust neck tension[B]*[/B] and run powder testing again until your best load also fills the case (but not compressed). Then fine tweak seating in a narrow window for tightest group shaping. [B]*[/B]With partial sized necks, tension is not interference fit. It's sized spring back(~1thou max) grip, against seated bullet bearing. So you adjust this tension through sizing LENGTH. Force X Area If FL sizing necks then forget any tension adjustment as an option. It's already extreme and varying a great deal due to donut and base-bearing junction binding. You could try bigger/smaller bushings, but the first adjustment of consistent value would be to stop FL sizing necks. [/QUOTE]
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Reloading
Reloaded seating depth test....
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