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Reloading Berger Bullets


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chatter marks on chamber and accuracy

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  #1  
Unread 07-20-2013, 07:16 PM
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chatter marks on chamber and accuracy

I have a new savage m12 br in 6mm norma. The chamber has the worst chatter marks on the shoulder. New lapua brass has generated good groups(5 shots .180 to mostly in the .3's). I have a return label to send it back to Savage to clean up the chamber or rebarrel. Im afraid they will send it back worse than what I have now. Should I leave well enough alone or roll the dice and hope for improvement in accuracy with a smooth chamber.
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  #2  
Unread 07-20-2013, 07:41 PM
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Re: chatter marks on chamber and accuracy

I would NOT accept that as "quality" on a factory new rifle
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  #3  
Unread 07-20-2013, 07:57 PM
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Re: chatter marks on chamber and accuracy

Quote:
Originally Posted by Sully2 View Post
I would NOT accept that as "quality" on a factory new rifle
Quote:
Originally Posted by tbrice23 View Post
I have a new savage m12 br in 6mm norma. The chamber has the worst chatter marks on the shoulder. New lapua brass has generated good groups(5 shots .180 to mostly in the .3's). I have a return label to send it back to Savage to clean up the chamber or rebarrel. Im afraid they will send it back worse than what I have now. Should I leave well enough alone or roll the dice and hope for improvement in accuracy with a smooth chamber.

Thanks Sully. I cant believe they have a quality control department.
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  #4  
Unread 07-20-2013, 08:53 PM
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Re: chatter marks on chamber and accuracy

Was probably a Monday morning, 8:30 am rifle or someone forgot to turn the coolant on.......

Things happen with production rifles, any brand.
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  #5  
Unread 07-20-2013, 09:09 PM
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Re: chatter marks on chamber and accuracy

I cant believe it groups. One reason I hate to see it go is that it renders ZERRO copper after first range session, hope its as accurate or better with a smooth chamber. I just forsee problems later in brass life even though I have a forrester bump die.
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  #6  
Unread 07-21-2013, 04:24 PM
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Re: chatter marks on chamber and accuracy

The problem you'll have is in setting headspace/bumping.
Gonna be a challenge to do this with munged up shoulders
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  #7  
Unread 07-21-2013, 04:50 PM
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Re: chatter marks on chamber and accuracy

I tried bumping up to .003 and still had problems .Even after re annealing the ones that chambered a little harder set up different vibrations and just didnt group with the others. That lapua brass isnt cheep.
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