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Rifles, Reloading, Optics, Equipment
Reloading
Case trimming- how many times?
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<blockquote data-quote="QuietTexan" data-source="post: 2437928" data-attributes="member: 116181"><p>Yup, no need to go crazy trimming, especially if it's a case that doesn't grow a lot because of the shoulders. It's an over-used process that, to Mike's point, is typically indicative of another step in the process not being optimized.</p><p></p><p></p><p>I load a lot of 30-06, which can grow rapidly and I do trim it - but specifically because I can hit the end of <em>my chamber </em>before the brass stabilizes. That would be a bad situation, jamming the bolt down aside it's one step closer to accidentaly grenading the rifle by crimping the case. But I rarely if ever trim back anything with a 30-40* shoulder other than uniforming length once the cases stabilize.</p><p></p><p>In the context of precision bolt action loading, cases really just don't grow that much for a lot of chamberings. If they don't grow why cut them? If I know the spec to the end of the chamber why trim off more than needed? I'm taking all this time to set shoulders and necks carefully, minimal brass movement all around, why start cutting chunks off the end of the neck. Goes against a useful way to adjust bullet seating also, which is length of neck sized. Some cases you don't have a caliber of neck to work with in the first place, so why knock a few hundredths off an already short neck if you don't need to.</p><p></p><p>Other situations - yeah sure go nuts and trim it back to min if the goal is reliability. When loading for an AR/an action that doesn't cam, loading mixed cases or pickup brass, forming cases, there are a bunch of situations where uniforming cases is more important than chasing absolute precision. Small base FL die, trim to min, run it until the neck splits. RCBS goes all on this with the X-Die - comes in small base, you trim once and you're done. All-in-one maximum resizing in one die.</p></blockquote><p></p>
[QUOTE="QuietTexan, post: 2437928, member: 116181"] Yup, no need to go crazy trimming, especially if it's a case that doesn't grow a lot because of the shoulders. It's an over-used process that, to Mike's point, is typically indicative of another step in the process not being optimized. I load a lot of 30-06, which can grow rapidly and I do trim it - but specifically because I can hit the end of [I]my chamber [/I]before the brass stabilizes. That would be a bad situation, jamming the bolt down aside it's one step closer to accidentaly grenading the rifle by crimping the case. But I rarely if ever trim back anything with a 30-40* shoulder other than uniforming length once the cases stabilize. In the context of precision bolt action loading, cases really just don't grow that much for a lot of chamberings. If they don't grow why cut them? If I know the spec to the end of the chamber why trim off more than needed? I'm taking all this time to set shoulders and necks carefully, minimal brass movement all around, why start cutting chunks off the end of the neck. Goes against a useful way to adjust bullet seating also, which is length of neck sized. Some cases you don't have a caliber of neck to work with in the first place, so why knock a few hundredths off an already short neck if you don't need to. Other situations - yeah sure go nuts and trim it back to min if the goal is reliability. When loading for an AR/an action that doesn't cam, loading mixed cases or pickup brass, forming cases, there are a bunch of situations where uniforming cases is more important than chasing absolute precision. Small base FL die, trim to min, run it until the neck splits. RCBS goes all on this with the X-Die - comes in small base, you trim once and you're done. All-in-one maximum resizing in one die. [/QUOTE]
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Case trimming- how many times?
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