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Rifles, Reloading, Optics, Equipment
Reloading
COAL using CBTO from Hornady OAL gauge significantly shorter than book COAL?
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<blockquote data-quote="Mikecr" data-source="post: 3072786" data-attributes="member: 1521"><p><u>Why the Hornady OAL tool?</u></p><p>To find touching COAL there is the simple split neck method, the cleaning rod method, bolt disassemble & sneak seat until the bolt handle drops. Then there is this Hornady tool, plagued with problem potentials, and forcing an averaging of readings..</p><p>A search here ('Hornady OAL') reveals a large trove of issues with that approach.</p><p></p><p><u>Why do folks fixate on a book value?</u></p><p>If you seat the bullets however you like and load develop with your choice, it makes little difference to velocities.</p><p>In contrast, It makes a difference to accuracy, which is beyond usefulness of reloading books, and a direct driver to ignore them.</p><p></p><p>You might think 'well the published loads are based on declared COAL', but you still don't know what the land relationship of that COAL was -from whomever pulled those loads out of their behind. You don't know what their accuracy, ES/SD, or neck sizing or tension was. You don't know about their barrel, chamber, or case sizing.</p><p>There really is zero basis to lock in on any one number from some book.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 3072786, member: 1521"] [U]Why the Hornady OAL tool?[/U] To find touching COAL there is the simple split neck method, the cleaning rod method, bolt disassemble & sneak seat until the bolt handle drops. Then there is this Hornady tool, plagued with problem potentials, and forcing an averaging of readings.. A search here ('Hornady OAL') reveals a large trove of issues with that approach. [U]Why do folks fixate on a book value?[/U] If you seat the bullets however you like and load develop with your choice, it makes little difference to velocities. In contrast, It makes a difference to accuracy, which is beyond usefulness of reloading books, and a direct driver to ignore them. You might think 'well the published loads are based on declared COAL', but you still don't know what the land relationship of that COAL was -from whomever pulled those loads out of their behind. You don't know what their accuracy, ES/SD, or neck sizing or tension was. You don't know about their barrel, chamber, or case sizing. There really is zero basis to lock in on any one number from some book. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
COAL using CBTO from Hornady OAL gauge significantly shorter than book COAL?
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