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Rifles, Reloading, Optics, Equipment
Reloading
Measuring Base to Ogive Length w/ Hornady OAL Gauge
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<blockquote data-quote="Bart B" data-source="post: 813853" data-attributes="member: 5302"><p>Woods explanation is a good one for the tools used.</p><p></p><p>I don't know what cartridge is the one used in this thread, but if it's one that headspaces on the shoulder, that's the control point for measuring where a given diameter on a seated bullet's ogive is. The case shoulder's hard against the chamber shoulder when its fired. The case head will be somewhere between almost zero to a few thousandths inch away from the bolt face depending on how much spread there is between the case head and shoulder across all the loaded rounds. A few thousandths is normal with full length sized cases.</p><p></p><p>So, if one wants the seated bullet to be exactly the same distance off the lands on all rounds when fired, the bullet seater has to use the case shoulder, not the case head, as its reference.</p></blockquote><p></p>
[QUOTE="Bart B, post: 813853, member: 5302"] Woods explanation is a good one for the tools used. I don't know what cartridge is the one used in this thread, but if it's one that headspaces on the shoulder, that's the control point for measuring where a given diameter on a seated bullet's ogive is. The case shoulder's hard against the chamber shoulder when its fired. The case head will be somewhere between almost zero to a few thousandths inch away from the bolt face depending on how much spread there is between the case head and shoulder across all the loaded rounds. A few thousandths is normal with full length sized cases. So, if one wants the seated bullet to be exactly the same distance off the lands on all rounds when fired, the bullet seater has to use the case shoulder, not the case head, as its reference. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Measuring Base to Ogive Length w/ Hornady OAL Gauge
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