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Rifles, Reloading, Optics, Equipment
Reloading
Case Trimming
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<blockquote data-quote="Clark" data-source="post: 679906" data-attributes="member: 6600"><p>I did a large scale experiment on trimming with a handful of dies and a handful of rifles.</p><p>Each population of brass was kept to one die.</p><p>I measured the case growth and trimmed with an RCBS 3 way in the vertical mill.</p><p></p><p>The lessons I learned are close to common knowledge.</p><p>The best way to trim is to not trim.</p><p>The best way to not trim is to keep brass dedicated to one rifle and either neck size, partial fl size, or push the shoulder back .001" with a FL die.</p><p></p><p>I could do 25 firings of 223 at 66kpsi by using a Lee Collet die, without trimming.</p></blockquote><p></p>
[QUOTE="Clark, post: 679906, member: 6600"] I did a large scale experiment on trimming with a handful of dies and a handful of rifles. Each population of brass was kept to one die. I measured the case growth and trimmed with an RCBS 3 way in the vertical mill. The lessons I learned are close to common knowledge. The best way to trim is to not trim. The best way to not trim is to keep brass dedicated to one rifle and either neck size, partial fl size, or push the shoulder back .001" with a FL die. I could do 25 firings of 223 at 66kpsi by using a Lee Collet die, without trimming. [/QUOTE]
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