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Rifles, Reloading, Optics, Equipment
Reloading
Bullet bearing surface question
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<blockquote data-quote="Mikecr" data-source="post: 231450" data-attributes="member: 1521"><p>I don't see how typical bearing surface length variance can affect anything at all.</p><p>.005"?</p><p>It doesn't affect BC</p><p>It doesn't affect seating depth(ogive to lands) or release force(from neck)</p><p>It doesn't affect pressure</p><p></p><p>What does affect BC, is nose lengths and meplate diameters.</p><p>What affects seating depth, is ogive radius variance.</p><p></p><p>There is currently a tool out there to check radius variance. If you seat off the lands, and your gun(your accuracy) is very sensitive to the distance, the check is well worth it.</p><p></p><p>It may just be me, but it seems like measuring bearing surface/base to bearing is so common because its easiest of all checks. Just like measuring brass weight is way easier than checking H20 capacity.. </p><p>Efforts that might make you feel good(and they can't hurt), but actually fail to connect with direct gains..</p></blockquote><p></p>
[QUOTE="Mikecr, post: 231450, member: 1521"] I don't see how typical bearing surface length variance can affect anything at all. .005"? It doesn't affect BC It doesn't affect seating depth(ogive to lands) or release force(from neck) It doesn't affect pressure What does affect BC, is nose lengths and meplate diameters. What affects seating depth, is ogive radius variance. There is currently a tool out there to check radius variance. If you seat off the lands, and your gun(your accuracy) is very sensitive to the distance, the check is well worth it. It may just be me, but it seems like measuring bearing surface/base to bearing is so common because its easiest of all checks. Just like measuring brass weight is way easier than checking H20 capacity.. Efforts that might make you feel good(and they can't hurt), but actually fail to connect with direct gains.. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Bullet bearing surface question
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