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Rifles, Reloading, Optics, Equipment
Reloading
6.5-284 coal question
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<blockquote data-quote="BrentM" data-source="post: 868418" data-attributes="member: 61747"><p>Good point OAL vs COAL. OAL is the OGIVE to case base length. This is the only true measurement that is meaningful for your specific rifle and bullet. COAL is what the testers used while writing a book. With a 140 VLD my COAL is 3.15 but my OAL is 2.482. This is .100 off the lands. 2.582 OAL is the bullet touching the lands. If I switch to the 160 Matrix I my OAL 2.508 for a seating depth .100 off the lands. So 2.482 vs 2.508 with different weights of bullets. Here is a weird one..... 140 SMK has the exact same OAL as the 160 Matrix.</p></blockquote><p></p>
[QUOTE="BrentM, post: 868418, member: 61747"] Good point OAL vs COAL. OAL is the OGIVE to case base length. This is the only true measurement that is meaningful for your specific rifle and bullet. COAL is what the testers used while writing a book. With a 140 VLD my COAL is 3.15 but my OAL is 2.482. This is .100 off the lands. 2.582 OAL is the bullet touching the lands. If I switch to the 160 Matrix I my OAL 2.508 for a seating depth .100 off the lands. So 2.482 vs 2.508 with different weights of bullets. Here is a weird one..... 140 SMK has the exact same OAL as the 160 Matrix. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
6.5-284 coal question
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