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Rifles, Reloading, Optics, Equipment
Reloading
Seating depth
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<blockquote data-quote="Mikecr" data-source="post: 389742" data-attributes="member: 1521"><p>The ogive(o-jive) of a bullet nose is not a specific place. Ogive only defines the nose 'shape' in cals of radius. It defines the curve of the full nose length.</p><p>The point where a bullet nose begins is just that, and really has nothing to do with land contact point(datum) on a nose.</p><p>So two bullets measuring same base to bearing(nose begin), could have completely different ogives(ogive radius), and end up different distance to lands even though measuring the same with your tool. That is, if your tool doesn't measure atleast near the contact datum of the nose.</p><p>I use a Sinclair 'nut' for every cartridge/bullet. Seems to work perfect, and marks very near contact marks.</p><p></p><p>When you change bullets, you have to redefine jam, for that bullet, in that barrel. Then adjust seating from there as you had before(ie, -5thou).</p></blockquote><p></p>
[QUOTE="Mikecr, post: 389742, member: 1521"] The ogive(o-jive) of a bullet nose is not a specific place. Ogive only defines the nose 'shape' in cals of radius. It defines the curve of the full nose length. The point where a bullet nose begins is just that, and really has nothing to do with land contact point(datum) on a nose. So two bullets measuring same base to bearing(nose begin), could have completely different ogives(ogive radius), and end up different distance to lands even though measuring the same with your tool. That is, if your tool doesn't measure atleast near the contact datum of the nose. I use a Sinclair 'nut' for every cartridge/bullet. Seems to work perfect, and marks very near contact marks. When you change bullets, you have to redefine jam, for that bullet, in that barrel. Then adjust seating from there as you had before(ie, -5thou). [/QUOTE]
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Reloading
Seating depth
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