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Rifles, Reloading, Optics, Equipment
Reloading
Calculating OAL
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<blockquote data-quote="Bart B" data-source="post: 738535" data-attributes="member: 5302"><p>There's another part of the loaded round that'll increase any spread a bullet's reference ogive point measured for seating depth. If a bunch of rounds have a .003" spread in seating depth to that reference, the case headspace spread on rimless bottleneck cases will add to it. Case head to shoulder reference spread is hard to keep under .002". It often has as much as .004 or more depending on the case lube used, how much of it's on the case to be full length sized and how much the reloading press springs when the case is all the way up into the sizing die. After all, those rounds have their shoulder hard against the chamber shoulder when they fire.</p></blockquote><p></p>
[QUOTE="Bart B, post: 738535, member: 5302"] There's another part of the loaded round that'll increase any spread a bullet's reference ogive point measured for seating depth. If a bunch of rounds have a .003" spread in seating depth to that reference, the case headspace spread on rimless bottleneck cases will add to it. Case head to shoulder reference spread is hard to keep under .002". It often has as much as .004 or more depending on the case lube used, how much of it's on the case to be full length sized and how much the reloading press springs when the case is all the way up into the sizing die. After all, those rounds have their shoulder hard against the chamber shoulder when they fire. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Calculating OAL
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