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Trim Length

 
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  #1  
Old 04-22-2010, 12:22 PM
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Trim Length

Reading an article
Precision Hand Loading for Long Range-Chapter One: Brass Sort & PrepBy Tres MonCeret

in the part where he talks about Trim to Length
Precision Hand Loading For Long Range-Chapter One: Brass Sort & Prep
the Sinclair Chamber Length Gage was used to determine the chamber length
Case Gauges & Headspace Tools - Sinclair Chamber Length Gage

Then Tres recommend to "trim your brass just short of this measurement instead of “book trim to” specs."
the part I don't get it, how short is short, do I need to be few thousands or hundreds off from the max?

Thank you.

Last edited by Jinx-); 04-22-2010 at 01:12 PM. Reason: clarification
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  #2  
Old 04-22-2010, 04:28 PM
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Re: Trim Length

Upps I will ask Tres directly
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Old 04-22-2010, 10:26 PM
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Re: Trim Length

no response yet from Tres, but I'll go ahead and ask you guys I trim 0.005" shorter them actual chamber length do you think I should cut lower or not?
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  #4  
Old 04-22-2010, 10:32 PM
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Re: Trim Length

I usually trim .015

Tarey
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  #5  
Old 04-22-2010, 10:51 PM
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Re: Trim Length

Is there a proven rule to go by when it comes to triming, maybe some formula something I can plug in to get best optimal length for my brass to fit in my chamber?
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  #6  
Old 04-23-2010, 05:28 AM
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Re: Trim Length

It is not a good idea to use factory or SAMMI spec lengths, as the end of the loaded case could contact the end of the barrel chamber, depending on how it was cut. This could cause pressures to skyrocket, not a good thing. For that reason, most reloaders trim between .010" and .020" below the SAMMI lengths. There is no good reason to do otherwise.
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  #7  
Old 04-23-2010, 06:11 AM
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Re: Trim Length

trim 0.020 off
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