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Neck turned too much?

 
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  #8  
Old 06-13-2013, 08:16 AM
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Join Date: Aug 2008
Location: east central fl. /n.c. pa.
Posts: 630
Re: Neck turned too much?

unless you have a tight neck custom chamber neck turning is unnessary anyway. lots of us prefer custom chambers of the no turn variety.
the problem you will have is once that brass is fired in your gun your standard die wont resize it down far enough to hold a bullet. unless of coarse your using a collet die. if not you will need one if you want to use that brass. might just be cheaper to throw away the brass.
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  #9  
Old 06-13-2013, 09:28 AM
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Join Date: Jun 2007
Location: Fredericksburg VA
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Re: Neck turned too much?

Quote:
Originally Posted by AZShooter View Post
I discovered something interesting when I turned down the 30 BR brass to .0105" neck wall thickness.

While I had a bushing die I decided to see what the RCBS FL die would do without the expander ball. It was a perfect .002" reduction in neck diameter. I actually quit using the bushing die! I set up the die for the exact shoulder bump and used a feeler gauge to measure the space between shell holder and die. After that I could instantly setup the FL die.

Who knows your standard FL die might work perfectly without the sizer ball if you necks are the right dimension.
It is impossible for a standard FL die to "fit perfectly" for those 10 cases AND the others that are. .002 larger!

However that method you describe is a way to check out whether or not it will work for that gun and it normally solves runout issues.
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  #10  
Old 06-13-2013, 03:19 PM
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Re: Neck turned too much?

Quote:
Originally Posted by AZShooter View Post
They are not ruined. But you may have a shorter brass life depending on your chamber dimensions. Many of us have turned brass down far more than that! I have a 30 BR that I turn down to .0105".


The issue isn't the amount of brass turned off but the dimension of the chamber neck vs the OD of a loaded round. There must be some space for bullet release. In some cases the reamer was made with a custom tight neck which required turning. The idea is to have consistent neck tension for bullet release and to conform to chamber as concentrically as possible. The previously mentioned 30 BR has a bullet release clearance of .001" per side.

Typically a factory chambering has a great deal of release clearance, IMO too much. If the brass gets turned then there is more expansion of the neck to seal chamber upon firing. This can over work the brass and cause premature cracking. I know all about it, I turned some 284 brass back when I started neck turning and it only lasted two firings. I realized that turning was not going to do great things in that sloppy necked sammi spec chamber.

You could segregate the "overturned" brass for practice or a comparison to your regular turned brass. See if the brass lasts or has to be retired early due to cracking.

Hope this helps
I agree with this. Also, keep the neck and shoulder of brass annealed and your necks won't crack as soon.
Good luck!
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  #11  
Old 06-13-2013, 07:32 PM
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Location: Spotsylvania, VA
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Re: Neck turned too much?

Thanks guys.
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