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Chamber length, and trim length question

 
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  #15  
Old 06-18-2010, 10:16 AM
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Join Date: May 2010
Posts: 6
Re: Chamber length, and trim length question

Quote:
Originally Posted by Mikecr View Post
It doesn't make sense that Sinclair would suggest an extreme clearance from mouth to chamber end.
Why not? It's the lawyer's game that make's them word thing's as they are. I'm not saying all, but chances are you will not even reach that -.024" length with a factory chamber. This is just a conclusion I've came to with my limited experence. I'm .039" from my chamber's max after I've uniformed new Lapua brass. That is why I like the gauge, keeps me from trimming brass to saami specs, that does not need to be trimmed.

Actully, per instruction's read;
WARNING
Excessive case length will cause dangerous chamber pressure's resulting in personal injury. We do not recommend increasing case length beyond published saami specifcation's. DO SO AT YOUR OWN RISK! If you do increase your case length, maintain the case length so that it is a minimum of .024" shorter then the chamber length.
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  #16  
Old 06-25-2010, 09:40 AM
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Join Date: Oct 2009
Posts: 16
Re: Chamber length, and trim length question

Quote:
Originally Posted by gunrac View Post
Why not? It's the lawyer's game that make's them word thing's as they are. I'm not saying all, but chances are you will not even reach that -.024" length with a factory chamber. This is just a conclusion I've came to with my limited experence. I'm .039" from my chamber's max after I've uniformed new Lapua brass. That is why I like the gauge, keeps me from trimming brass to saami specs, that does not need to be trimmed.

Actully, per instruction's read;
WARNING
Excessive case length will cause dangerous chamber pressure's resulting in personal injury. We do not recommend increasing case length beyond published saami specifcation's. DO SO AT YOUR OWN RISK! If you do increase your case length, maintain the case length so that it is a minimum of .024" shorter then the chamber length.

Well I'm thinking the lawyers picked the number. An experienced tech probably said 10-12 thousandths and they doubled it.
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