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Rifles, Reloading, Optics, Equipment
Reloading
Why can't i reload exact cartridges?
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<blockquote data-quote="SMK1000plus" data-source="post: 1574375" data-attributes="member: 93846"><p>What I've found with my loads Dom, particularly with 95% full case charges, or especially heavily compressed powder charges, and with heavy for caliber VLD style or ELD style bullets, is reloading press flex... Yes even my Rockchucker! I have even set dial indicators on the press frame, mount base and ram. I have noted from .001" to as much as .004" flex, depending on the % of case fill and how well the powder packs into the case, even with long drop tubes! I have also often noticed minor ogive deformation, when loading charges and bullets as noted above, even thought my seater plugs are casts of the exact type of bullets I'm loading and I drill the tip out of the seat with a 1/8" bit, to garuantee that the tip can't bottom out.</p><p></p><p>Try this; seat a bullet in a sized but unprimed case. Check the BTO and COAL length of that weight charge, loaded cartridge. Next charge a case with the same powder charge that causes your BOT measurement inconsistency but, do not seat a bullet yet. Next take something that vibrates strongly, like an electric toothbrush or as I use, an old electric engraver, cover the neck of the cartridge so that no powder granules bounce out, and vibrate the cartridge while lightly tapping it, until the powder granules compact/seat. Now seat your bullet as usual. Try 10 rounds like this. How consistent are your cartridge's BTO measurements now? <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="SMK1000plus, post: 1574375, member: 93846"] What I've found with my loads Dom, particularly with 95% full case charges, or especially heavily compressed powder charges, and with heavy for caliber VLD style or ELD style bullets, is reloading press flex... Yes even my Rockchucker! I have even set dial indicators on the press frame, mount base and ram. I have noted from .001" to as much as .004" flex, depending on the % of case fill and how well the powder packs into the case, even with long drop tubes! I have also often noticed minor ogive deformation, when loading charges and bullets as noted above, even thought my seater plugs are casts of the exact type of bullets I'm loading and I drill the tip out of the seat with a 1/8" bit, to garuantee that the tip can't bottom out. Try this; seat a bullet in a sized but unprimed case. Check the BTO and COAL length of that weight charge, loaded cartridge. Next charge a case with the same powder charge that causes your BOT measurement inconsistency but, do not seat a bullet yet. Next take something that vibrates strongly, like an electric toothbrush or as I use, an old electric engraver, cover the neck of the cartridge so that no powder granules bounce out, and vibrate the cartridge while lightly tapping it, until the powder granules compact/seat. Now seat your bullet as usual. Try 10 rounds like this. How consistent are your cartridge's BTO measurements now? :) [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Why can't i reload exact cartridges?
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