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Rifles, Reloading, Optics, Equipment
Reloading
Trimming tips?
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<blockquote data-quote="QuietTexan" data-source="post: 2638318" data-attributes="member: 116181"><p>Like Mike said you eyeball it. I use the K+M cutter with their recommended cutter based on case shoulder angle, it cuts a wider and shallower band on the shoulder than the standard 50* cutter. I had no issues turning my 243 cases down by eye, they were getting blown out to an AI shoulder and one case held together for 11 firings in a row - no web expansion, no measurable case head stretch, didn't grow enough to need trimming, and there was no apparent thinning in the neck/shoulder area as a result of turning the neck down.</p><p></p><p>It's one of those things that once you do it once it clicks and you do it 50 more times without really having to worry about it.</p><p></p><p></p><p>That's what pretty much everyone that actually measures a chamber finds out. </p><p></p><p>And when guys stop trimming compulsively they actually stop introducing variance into their cases by trimming them at varying headspace lengths. If someone trims a case new they've started a self-perpetuating cycle of having to trim every firing until the cases stabilize. Don't trim the first time because there's no need to based on actual chamber length and let the cases go a few firings. It's interesting how so many cases never actually grow to the point they need to be trimmed, and how tight a range cases will stay in when left alone.</p></blockquote><p></p>
[QUOTE="QuietTexan, post: 2638318, member: 116181"] Like Mike said you eyeball it. I use the K+M cutter with their recommended cutter based on case shoulder angle, it cuts a wider and shallower band on the shoulder than the standard 50* cutter. I had no issues turning my 243 cases down by eye, they were getting blown out to an AI shoulder and one case held together for 11 firings in a row - no web expansion, no measurable case head stretch, didn't grow enough to need trimming, and there was no apparent thinning in the neck/shoulder area as a result of turning the neck down. It's one of those things that once you do it once it clicks and you do it 50 more times without really having to worry about it. That's what pretty much everyone that actually measures a chamber finds out. And when guys stop trimming compulsively they actually stop introducing variance into their cases by trimming them at varying headspace lengths. If someone trims a case new they've started a self-perpetuating cycle of having to trim every firing until the cases stabilize. Don't trim the first time because there's no need to based on actual chamber length and let the cases go a few firings. It's interesting how so many cases never actually grow to the point they need to be trimmed, and how tight a range cases will stay in when left alone. [/QUOTE]
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Trimming tips?
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