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Case Length

 
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  #1  
Old 07-09-2011, 09:24 PM
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Join Date: Apr 2011
Location: Texas City, TX
Posts: 37
Case Length

I reload .30-06 cartridges and the manuals all say the case trimmed length should be 2.484". I started with virgin brass and have fire formed the cases 3x. I have found a few cases that are SHORTER than the minimum length; one of them measures 2.470"! What gives? Do I destroy the extra short ones and cut my losses or do I continue using them? I don't know if it's safe to use them. I need some guidance here.
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Old 07-09-2011, 10:24 PM
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Re: Case Length

Quote:
Originally Posted by LR-Shooter View Post
I reload .30-06 cartridges and the manuals all say the case trimmed length should be 2.484". I started with virgin brass and have fire formed the cases 3x. I have found a few cases that are SHORTER than the minimum length; one of them measures 2.470"! What gives? Do I destroy the extra short ones and cut my losses or do I continue using them? I don't know if it's safe to use them. I need some guidance here.


They are supposed to be shorter than the SAMMI spec. in order to fit all chambers without
hitting the end of the neck chamber(A common cause of excessive pressure)

The trim length is the absolute Max length and most people trim around .020 thousandths
shorter.

So I would measure the shortest piece of brass and trim all the rest to that length unless it
is .050 or .060thousandths short.

Your brass is fine.

J E CUSTOM
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  #3  
Old 07-09-2011, 10:34 PM
Edd Edd is offline
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Re: Case Length

Saami shows case length of 2.474" - 2.494".
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  #4  
Old 07-09-2011, 10:53 PM
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Re: Case Length

J E Custom:
As mine are at least .014" shorter than book minimum does that mean my brass is still ok to use?
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Old 07-09-2011, 10:57 PM
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Re: Case Length

Edd:
You said SAMMI specs call for case length to be---2.474" to 2.494". My shortest case is still shorter than specs (2.470"). I wonder if the brass will stretch with more firings???
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  #6  
Old 07-09-2011, 11:08 PM
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Re: Case Length

It most likely will, and in my OP you dont have anything to worry about.
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  #7  
Old 07-10-2011, 06:47 AM
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Re: Case Length

J E Custom, Edd, sp6x6, and the rest of the folks here at LRH have been very helpful. Thanks to all.
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