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Rifles, Reloading, Optics, Equipment
Reloading
How much to turn necks?
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<blockquote data-quote="Guest" data-source="post: 113466"><p><strong> [ QUOTE ]</strong></p><p><strong> <font color="purple">DW Writes: i do agree that measuring fired brass is not an exact thing for chamber diameter, but it will get you in the ballpark,probably within .001. </strong></p><p><strong>DC responds: Using 5 different brands of cases will yield 5 different case neck thickness dimensions. Also the cases will be of different temper or hardness, so they will never be even close as to figuring the chamber neck dimension from a fired case.</strong></p><p> <strong></font> </strong> </p><p></p><p>[/ QUOTE ]</p><p></p><p>.001 is the often quoted spring-back (I have no evidence it's accurate), but to say "never be even close" is meaningless without quantifying. Never be within .003? Even with one brand of brass from different batches, hardness varies. FC is known to be softer than other brass. Even so, the diff between the hardest and softest brass will not be more than .001 (spring-back of .001 to .002 - just my wild *** guess).</p><p></p><p>GSSP --&gt; It's really easy to make a chamber cast with Cerrosafe (it melts below the boiling point of water). </p><p></p><p>I would guess .002 clearance is too tight for a hunting rifle.</p></blockquote><p></p>
[QUOTE="Guest, post: 113466"] [b] [ QUOTE ] <font color="purple">DW Writes: i do agree that measuring fired brass is not an exact thing for chamber diameter, but it will get you in the ballpark,probably within .001. DC responds: Using 5 different brands of cases will yield 5 different case neck thickness dimensions. Also the cases will be of different temper or hardness, so they will never be even close as to figuring the chamber neck dimension from a fired case. </font> [/b] [/ QUOTE ] .001 is the often quoted spring-back (I have no evidence it's accurate), but to say "never be even close" is meaningless without quantifying. Never be within .003? Even with one brand of brass from different batches, hardness varies. FC is known to be softer than other brass. Even so, the diff between the hardest and softest brass will not be more than .001 (spring-back of .001 to .002 - just my wild *** guess). GSSP --> It's really easy to make a chamber cast with Cerrosafe (it melts below the boiling point of water). I would guess .002 clearance is too tight for a hunting rifle. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
How much to turn necks?
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