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Rifles, Reloading, Optics, Equipment
Reloading
Concentricity - setting up dies - runout
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<blockquote data-quote="Bart B" data-source="post: 510310" data-attributes="member: 5302"><p>At the back of the case body where it rides in the V block (which has two points where the case body touches), the normal out-of-round condition of the case at that point will cause wobbly readings even if the case neck and bullet are in perfect alignment and straight with the case body axis. 'Tain't no such thing as a perfectly round case.</p><p></p><p>The other problem with this type of cartridge spinner is anytime a rimless bottleneck case neck's not perfectly aligned with the case shoulder, the bullet will end up off center in the barrel's throat when the case shoulder centers in the chamber shoulder. Same thing with belted bottleneck cases that have been resized such that the case headspaces on its shoulder when fired instead of the belt.</p><p></p><p>The above aside, that cartridge spinner looks pretty good. A couple thousandths runout won't be any problem anyway.</p></blockquote><p></p>
[QUOTE="Bart B, post: 510310, member: 5302"] At the back of the case body where it rides in the V block (which has two points where the case body touches), the normal out-of-round condition of the case at that point will cause wobbly readings even if the case neck and bullet are in perfect alignment and straight with the case body axis. 'Tain't no such thing as a perfectly round case. The other problem with this type of cartridge spinner is anytime a rimless bottleneck case neck's not perfectly aligned with the case shoulder, the bullet will end up off center in the barrel's throat when the case shoulder centers in the chamber shoulder. Same thing with belted bottleneck cases that have been resized such that the case headspaces on its shoulder when fired instead of the belt. The above aside, that cartridge spinner looks pretty good. A couple thousandths runout won't be any problem anyway. [/QUOTE]
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Concentricity - setting up dies - runout
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