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Rifles, Reloading, Optics, Equipment
Reloading
Shoulder bump problem? Not far enough?
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<blockquote data-quote="Bart B" data-source="post: 867063" data-attributes="member: 5302"><p>Doesn't Redding's competition shellholders start at .125" then increment in .002" steps in height? Wouldn't using them stopping against the die's bottom make the case go .002" less up into the die for each incremental one used?</p><p></p><p>Long before shims were used to push belted cases further up into dies for a short-chambered barrel, folks ground a few thousandths off the full length sizing die's bottom. There's about .090" to .010" from a belted sizing die's bottom (on the six that I have, anyway) to the belt clearance step. With a .125" shellholder height, case heads will stop about .215" to .225" below the die's belt ridge. </p><p></p><p>Belt headspace on the case specs are typically .212" to .220". Depending on the lot of brass one has, they could grind enough of the die's bottom to still use their cases without damaging the belt with the die. If one chooses to grind off their die's bottom, make the right measurements on both the die and cases to know how much to shorten the die before case belts will crunch into the die's belt ridge.</p><p></p><p>Grinding off shell holders is probably a more sensible solution; making an error on one means a new shellholder gets bought. They're a lot cheaper than dies.</p><p></p><p>Here's a link to a page with die adjustment labels that can be printed on sticky back paper, cut out then stuck on die lock rings. They simplify accurately adjusting die heights in tiny increments:</p><p></p><p><a href="http://i860.photobucket.com/albums/ab170/jepp2/DieAdjustment-1.jpg" target="_blank">http://i860.photobucket.com/albums/ab170/jepp2/DieAdjustment-1.jpg</a></p></blockquote><p></p>
[QUOTE="Bart B, post: 867063, member: 5302"] Doesn't Redding's competition shellholders start at .125" then increment in .002" steps in height? Wouldn't using them stopping against the die's bottom make the case go .002" less up into the die for each incremental one used? Long before shims were used to push belted cases further up into dies for a short-chambered barrel, folks ground a few thousandths off the full length sizing die's bottom. There's about .090" to .010" from a belted sizing die's bottom (on the six that I have, anyway) to the belt clearance step. With a .125" shellholder height, case heads will stop about .215" to .225" below the die's belt ridge. Belt headspace on the case specs are typically .212" to .220". Depending on the lot of brass one has, they could grind enough of the die's bottom to still use their cases without damaging the belt with the die. If one chooses to grind off their die's bottom, make the right measurements on both the die and cases to know how much to shorten the die before case belts will crunch into the die's belt ridge. Grinding off shell holders is probably a more sensible solution; making an error on one means a new shellholder gets bought. They're a lot cheaper than dies. Here's a link to a page with die adjustment labels that can be printed on sticky back paper, cut out then stuck on die lock rings. They simplify accurately adjusting die heights in tiny increments: [url]http://i860.photobucket.com/albums/ab170/jepp2/DieAdjustment-1.jpg[/url] [/QUOTE]
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Shoulder bump problem? Not far enough?
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