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Rifles, Reloading, Optics, Equipment
Reloading
Case web expansion help
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<blockquote data-quote="CatShooter" data-source="post: 1315140" data-attributes="member: 7"><p>the problem with this "method" is that there is a wide variation in the hardness of brass in cartridge cases, and heads.</p><p></p><p>I have measured case heads with a very good hardness gauge, and the Lapua - Norma, Lake City are about TWICE as hard as the Remington - Hornady etc group.</p><p></p><p>So, what is a 50,000 psi load in a Rem case, will need 100,000 psi inn a Lake City or Lapua to match.</p><p></p><p>It is just not possible to use case expansion for a realistic gauge.</p><p></p><p>I've been there, and got the tee shirt (in spades).</p><p></p><p></p><p></p><p><u><a href="http://bulletin.accurateshooter.com/2014/05/how-hard-is-your-brass-5-56-and-223-rem-base-hardness-tests/" target="_blank">http://bulletin.accurateshooter.com/2014/05/how-hard-is-your-brass-5-56-and-223-rem-base-hardness-tests/</a></u></p><p><u></u></p><p><u></u></p><p><u></u></p><p><u></u> </p><p><img src="http://i61.photobucket.com/albums/h73/KittyWhacker/Annealing/Blade%20Micrometer%20-%20600_zpsnlz7atue.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p><img src="http://i61.photobucket.com/albums/h73/KittyWhacker/Annealing/AAAAA008_zps32667d17.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p><img src="http://i61.photobucket.com/albums/h73/KittyWhacker/Annealing/AAAAA012_zpsb57bce5e.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p></blockquote><p></p>
[QUOTE="CatShooter, post: 1315140, member: 7"] the problem with this "method" is that there is a wide variation in the hardness of brass in cartridge cases, and heads. I have measured case heads with a very good hardness gauge, and the Lapua - Norma, Lake City are about TWICE as hard as the Remington - Hornady etc group. So, what is a 50,000 psi load in a Rem case, will need 100,000 psi inn a Lake City or Lapua to match. It is just not possible to use case expansion for a realistic gauge. I've been there, and got the tee shirt (in spades). [U][URL]http://bulletin.accurateshooter.com/2014/05/how-hard-is-your-brass-5-56-and-223-rem-base-hardness-tests/[/URL] [/U] [IMG]http://i61.photobucket.com/albums/h73/KittyWhacker/Annealing/Blade%20Micrometer%20-%20600_zpsnlz7atue.jpg[/IMG] [IMG]http://i61.photobucket.com/albums/h73/KittyWhacker/Annealing/AAAAA008_zps32667d17.jpg[/IMG] [IMG]http://i61.photobucket.com/albums/h73/KittyWhacker/Annealing/AAAAA012_zpsb57bce5e.jpg[/IMG] [U][/U] [/QUOTE]
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Reloading
Case web expansion help
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