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Powder residue entire length of case....help

 
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  #8  
Old 02-03-2013, 01:03 PM
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Join Date: Apr 2006
Location: Nebraska
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Re: Powder residue entire length of case....help

VarmintH8R,
Good idea, I did a little searching and found head space issue which prompted me to measure OAL on cases. This is weird:

New brass very consistent at 2.160"
Hornady fired = 4 cases did not stretch 2.160", 1 stretched to 2.165"
Nosler fired = 5 cases all stretched to 2.165"
Berger fired = 2 cases did not stretch 2.160"

I'm just not sure how hard Lapua brass is but would hint toward low pressure hard brass.

I have a local gunsmith that I will contact tomorrow to see if we can run go - nogo gauges into the chamber.

Scott
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  #9  
Old 02-03-2013, 01:44 PM
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Re: Powder residue entire length of case....help

Makes sense to me. Let us know what you find out!
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  #10  
Old 02-04-2013, 02:17 PM
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Join Date: Dec 2012
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Re: Powder residue entire length of case....help

When I had that problem, a pro told me to anneal the necks. After he showed me the tricks to annealing, that fixed it. He anneals necks every 4th loading.
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  #11  
Old 02-05-2013, 01:27 AM
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Re: Powder residue entire length of case....help

Great Thread Guys!! I'm a rookie also so all this builds my 'data bank'. Thanks for sharing your experiences, trials and tribulations! Very much appreciated

Doc
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  #12  
Old 02-05-2013, 10:15 PM
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Join Date: Apr 2006
Location: Nebraska
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Re: Powder residue entire length of case....help

jpnicho - I definitely think there is some relevance here, this is why I ask about the hardness of the Lapua brass even though they are annealed from the factory.

I cannot get out until this weekend but I intend to load a few vld's at 51grns. I'm also contemplating extending the OAL, though hesitant because I want 100% neck contact due to using this load for hunting (mostly for target but hunting nonetheless).

I will follow up.
Scott
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  #13  
Old 02-08-2013, 03:31 AM
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Re: Powder residue entire length of case....help

It can also be too light neck tension. If the powder is slow and the load light the bullet gets out before the case neck seals.
With new Lapua cases I doubt that neck hardness is the issue .
Try a tad faster powder or higher neck tension .
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  #14  
Old 02-09-2013, 09:57 PM
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Join Date: Apr 2006
Location: Nebraska
Posts: 13
Re: Powder residue entire length of case....help

Bullet Bumper, I agree, this could also contribute to the cause. More neck tension - more pressure.

I believe the problem was due to low pressure. We could add neck tension, increase overall length, but I elected to increase powder charge. Today I shot 3 loads at 51gr of R22 and the powder residue was contained to the neck area only! I will not shoot more of these loads until I get a chrono to shoot across. I feel there are too many variable at play and fps is a critical piece of the puzzle that is missing.

Thanks to everyone who contributed. I MAY post my final findings but I'm sure it will be a long time down the road as I want to do this right and.......did I mention the 270WSM/300WM/22-250/223.......!

Regards
Scott
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