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Rifles, Reloading, Optics, Equipment
Reloading
Case Trimming
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<blockquote data-quote="Bart B" data-source="post: 103756" data-attributes="member: 5302"><p>Any trimmer that makes a square mouth will do just fine. Depending on ones abilities, one make/model may be easier to use than another. I like the Wilson for slow work but the Forster on a drill press bed is great.</p><p></p><p>I think the case length should be no longer than what's ten thousandths of an inch shorter than chamber length. A good caliper will measure them and compare the readings with data from a decent loading manual for maximum length. And I've seen no difference in accuracy if there's several thousandths of an inch difference in a batch of cases.</p><p></p><p>After trimming, I chamfer the mouth with an Eazy-Out screw remover turned clockwise; makes a better angle and virtually no burrs or sharp corners which means bullets won't have jacket material scraped off when they're seated. Conventional deburring tools do well on the outside of the mouth. Finally, I run the case mouths over a bore brush spinning in a drill press to clean up all the inside edges and surfaces.</p></blockquote><p></p>
[QUOTE="Bart B, post: 103756, member: 5302"] Any trimmer that makes a square mouth will do just fine. Depending on ones abilities, one make/model may be easier to use than another. I like the Wilson for slow work but the Forster on a drill press bed is great. I think the case length should be no longer than what's ten thousandths of an inch shorter than chamber length. A good caliper will measure them and compare the readings with data from a decent loading manual for maximum length. And I've seen no difference in accuracy if there's several thousandths of an inch difference in a batch of cases. After trimming, I chamfer the mouth with an Eazy-Out screw remover turned clockwise; makes a better angle and virtually no burrs or sharp corners which means bullets won't have jacket material scraped off when they're seated. Conventional deburring tools do well on the outside of the mouth. Finally, I run the case mouths over a bore brush spinning in a drill press to clean up all the inside edges and surfaces. [/QUOTE]
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