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Rifles, Reloading, Optics, Equipment
Reloading
seating depth increments
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<blockquote data-quote="Mikecr" data-source="post: 1297734" data-attributes="member: 1521"><p>If you pulled seating out of your butt for OCW testing, then what are the chances that actually was best seating -to base your OCW results on? Then if you go to large seating adjustments, you'll collapse OCW at the same time that you're trying to evaluate just seating..</p><p></p><p>IMO you should do seating testing first(Berger recommended), then OCW(or ladder if chosen), then only a final tweak of seating for best group shaping. With this you'd have a sound basis for your OCW, and the final tweaking(within 10thou) won't affect the load so much as to cause 2 changes at once.</p><p></p><p>OCW is about finding a forgiving powder load, not the most accurate overall load.</p><p>The failure in OCW to reach most accurate is that it dismisses seating, while this is actually the single greatest adjustment to accuracy.</p><p>It's common to see greater opening/closing of grouping with seating testing(actual/Berger's) than any powder changes could cause. This is because seating is the coarse adjustment, and powder is only fine.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1297734, member: 1521"] If you pulled seating out of your butt for OCW testing, then what are the chances that actually was best seating -to base your OCW results on? Then if you go to large seating adjustments, you'll collapse OCW at the same time that you're trying to evaluate just seating.. IMO you should do seating testing first(Berger recommended), then OCW(or ladder if chosen), then only a final tweak of seating for best group shaping. With this you'd have a sound basis for your OCW, and the final tweaking(within 10thou) won't affect the load so much as to cause 2 changes at once. OCW is about finding a forgiving powder load, not the most accurate overall load. The failure in OCW to reach most accurate is that it dismisses seating, while this is actually the single greatest adjustment to accuracy. It's common to see greater opening/closing of grouping with seating testing(actual/Berger's) than any powder changes could cause. This is because seating is the coarse adjustment, and powder is only fine. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
seating depth increments
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