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Rifles, Reloading, Optics, Equipment
Reloading
Bullet ogive differences
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<blockquote data-quote="Mikecr" data-source="post: 1208558" data-attributes="member: 1521"><p>If you're setting a target CBTO, then nothing about the bullets matter to distance to land relationship(it's set in CBTO). Bearing, and BTO are meaningless -even where qualified to what you think they actually are. They play virtually zero role in pressure.</p><p></p><p>To clear some things, the 'ogive' is full length/curvature of a nose. Bearing end would be ogive begin, and your comparators do not actually take datum from this point on the nose.</p><p>A qualified measure here begins with matched ogive radius for each bullet, so that tool contact on ogives match from bullet to bullet(wherever that is).</p><p>Comparisons of BTO also begin with qualifying datums, and where they haven't been your measure is wrong. BTO is meaningless because it does not separate individual contributors(base length, base angle, bearing length, ogive datum). And BTO is meaningless to seated CBTO.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1208558, member: 1521"] If you're setting a target CBTO, then nothing about the bullets matter to distance to land relationship(it's set in CBTO). Bearing, and BTO are meaningless -even where qualified to what you think they actually are. They play virtually zero role in pressure. To clear some things, the 'ogive' is full length/curvature of a nose. Bearing end would be ogive begin, and your comparators do not actually take datum from this point on the nose. A qualified measure here begins with matched ogive radius for each bullet, so that tool contact on ogives match from bullet to bullet(wherever that is). Comparisons of BTO also begin with qualifying datums, and where they haven't been your measure is wrong. BTO is meaningless because it does not separate individual contributors(base length, base angle, bearing length, ogive datum). And BTO is meaningless to seated CBTO. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Bullet ogive differences
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