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Rifles, Reloading, Optics, Equipment
Reloading
Bullet Seating Depth
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<blockquote data-quote="Mikecr" data-source="post: 2277837" data-attributes="member: 1521"><p>Why care about tracking throat erosion?</p><p>This serves no function for hunting capacity cartridges.</p><p>Optimum seating depth is a matter of best bullet-bore interface. It's window widens as lands retreat, and there is only narrow circumstances with which to adjust from initially tested optimum CBTO -for the accurate life of a barrel.</p><p></p><p>The occasion where this is different is only when you're shooting an underbore for benchrest competition(like a 6PPC, or 30br).</p><p>In that case your TUNE would rely on a starting pressure setup by an ITL relationship. This is where it's appropriate to chase lands.</p><p>Hunting capacity cartridges cannot go where underbores go. It is not viable to run anywhere near those pressures (achieved with ITL relationships, and very fast powders in tiny cases for bore, & breech support).</p></blockquote><p></p>
[QUOTE="Mikecr, post: 2277837, member: 1521"] Why care about tracking throat erosion? This serves no function for hunting capacity cartridges. Optimum seating depth is a matter of best bullet-bore interface. It's window widens as lands retreat, and there is only narrow circumstances with which to adjust from initially tested optimum CBTO -for the accurate life of a barrel. The occasion where this is different is only when you're shooting an underbore for benchrest competition(like a 6PPC, or 30br). In that case your TUNE would rely on a starting pressure setup by an ITL relationship. This is where it's appropriate to chase lands. Hunting capacity cartridges cannot go where underbores go. It is not viable to run anywhere near those pressures (achieved with ITL relationships, and very fast powders in tiny cases for bore, & breech support). [/QUOTE]
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Bullet Seating Depth
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