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Rifles, Reloading, Optics, Equipment
Reloading
ReSizing Question
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<blockquote data-quote="Bart B" data-source="post: 840485" data-attributes="member: 5302"><p>That .553" diameter on a fired case that had .547" diameter when new concerns me. That's a .006" increase in diameter. Was it measured on the case rim behind the extractor groove or in front of that groove on the case body?</p><p></p><p>What load are you using? </p><p></p><p>Here's the cartridge spec'd dimensions:</p><p></p><p><a href="http://www.saami.org/PubResources/CC_Drawings/Rifle/300%20Winchester%20Short%20Magnum.pdf" target="_blank">http://www.saami.org/PubResources/CC_Drawings/Rifle/300 Winchester Short Magnum.pdf</a></p><p></p><p>Try blackening the entire back end of a reloaded case with a black marker, then chamber and extract it. Look for shiny spots or scrapes and scratches where the case interfered with the rifle parts. That'll show you where something's happening that might be bad. Post your results; pictures would be great.</p><p></p><p>I've been full length sizing all my cases for decades. My match rifles shooting such stuff do as well as long range benchrest rigs, so I see nothing bad about doing so. While some adamantly object to even trying such sizing ways doing it how many people win matches and set records full length sizing their fired cases, there is more than one way to eat pie, too, and it'll taste perfect to all of them.</p><p></p><p>There's no problem following a die set's included instructions as long as one realizes they may not produce the most accurate ammo nor longest case life.</p></blockquote><p></p>
[QUOTE="Bart B, post: 840485, member: 5302"] That .553" diameter on a fired case that had .547" diameter when new concerns me. That's a .006" increase in diameter. Was it measured on the case rim behind the extractor groove or in front of that groove on the case body? What load are you using? Here's the cartridge spec'd dimensions: [url]http://www.saami.org/PubResources/CC_Drawings/Rifle/300%20Winchester%20Short%20Magnum.pdf[/url] Try blackening the entire back end of a reloaded case with a black marker, then chamber and extract it. Look for shiny spots or scrapes and scratches where the case interfered with the rifle parts. That'll show you where something's happening that might be bad. Post your results; pictures would be great. I've been full length sizing all my cases for decades. My match rifles shooting such stuff do as well as long range benchrest rigs, so I see nothing bad about doing so. While some adamantly object to even trying such sizing ways doing it how many people win matches and set records full length sizing their fired cases, there is more than one way to eat pie, too, and it'll taste perfect to all of them. There's no problem following a die set's included instructions as long as one realizes they may not produce the most accurate ammo nor longest case life. [/QUOTE]
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ReSizing Question
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