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Rifles, Reloading, Optics, Equipment
Reloading
Second opinion on seating depth
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<blockquote data-quote="Bart B" data-source="post: 1124056" data-attributes="member: 5302"><p>Do all you folks seating bullets for a new barrel to .XXX" off the lands seat them .001" further out of the case to compensate for throat erosion wear for every dozen or so shots so bullet jump distance stays inside a .001" spread? .308 Win chamber throats lengthen .001" for every 30 to 40 rounds fired.</p><p></p><p>If you're using bottleneck cases head spacing off their shoulders, case headspace spread across a batch of them will easily be .003" The bullet's jump to the rifling will have at least that much spread. Their cases will also have that much spread in head clearance to the bolt face when fired.</p></blockquote><p></p>
[QUOTE="Bart B, post: 1124056, member: 5302"] Do all you folks seating bullets for a new barrel to .XXX" off the lands seat them .001" further out of the case to compensate for throat erosion wear for every dozen or so shots so bullet jump distance stays inside a .001" spread? .308 Win chamber throats lengthen .001" for every 30 to 40 rounds fired. If you're using bottleneck cases head spacing off their shoulders, case headspace spread across a batch of them will easily be .003" The bullet's jump to the rifling will have at least that much spread. Their cases will also have that much spread in head clearance to the bolt face when fired. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Second opinion on seating depth
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