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Donut formation question

 
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  #1  
Old 08-30-2013, 10:51 PM
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Join Date: Feb 2013
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Donut formation question

Hello,
I have some brass that I neck turned that has been fired 4x. If there is no donut formation at this point, would you expect to see it in the future?
Thanks,
Ken
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  #2  
Old 08-30-2013, 11:19 PM
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Location: California Central Cost
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Re: Donut formation question

Mix some flour, yeast and water.

or

If you did it right ..... You will have to go to the donut store.

I don't think there is a hard rule here.

I have a lot of Lapua that has some cases with donut. TBH I think I got the turning a little short.

So far, I've not seen a donut develop on those cases I 'got right' so I can't say.

I don't shoot hot but as I understand it, hot loads will 'flow' brass back up into the neck. Then you ream. I got the reamer for the Lapua brass but have not processed that lot since it arrived.
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  #3  
Old 08-31-2013, 05:49 PM
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Re: Donut formation question

Donuts form with sizing. When you roll brass up the body into necks, you form donuts.
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  #4  
Old 09-02-2013, 11:58 AM
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Re: Donut formation question

Quote:
Originally Posted by Mikecr View Post
Donuts form with sizing. When you roll brass up the body into necks, you form donuts.
Harumph
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  #5  
Old 09-02-2013, 02:44 PM
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Re: Donut formation question

I should have mentioned, if you don't have to do a lot of body sizing, and you're mindful not to cause donuts, you will never re-form them.
You removed any with neck turning, and they just don't happen again on their own.
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