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308 Neck Sizing Issues

 
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  #8  
Old 12-11-2013, 08:35 PM
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Join Date: Jun 2007
Location: Fredericksburg VA
Posts: 4,137
Re: 308 Neck Sizing Issues

I agree FL size to normally avoid problems.

However, in this case something sounds familiar, especially if a unloaded case will chamber but a loaded one will not. That is not normally a shoulder bump issue when that happens. Either the empty cases will chamber or they will not without difficulty.

Did you trim/rechamfer the necks after FL sizing?

Take a loaded round and run your fingernail from the shoulder to the bullet and see if you feel as slight ridge at the very edge of the brass at the top of the neck.

IF you do, you have a problem with your neck chamfering tool rolling the outside neck rim over very slightly instead of cutting it cleanly. Mine was a 40 year old tool, that once replaced and necks rechamfered, solved the problem.

I have seen it twice and it happened to me last summer. I had to take nail file and file off the ridge on the loaded rounds at a match.

The resized cases chambered perfectly BUT when you put a bullet in them, that ridge stood out enough to hinder chambering. The empty case easily squeezed down until you put a bullet in it.

Just something else to look at and easily find and fix.
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  #9  
Old 12-23-2013, 09:59 AM
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Join Date: Oct 2011
Posts: 29
Re: 308 Neck Sizing Issues

Just got back from the range, shot out to 1k, no difference in accuracy between the two. I think I'll stick with FL sizing... the time I spend correcting sticky rounds doesn't really pay off to not have to trim.

This brass was never trimmed/chamfered and it was shot without issue previously. I think like mentioned it was the headspacing issues.

Thank you everyone for your help.
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  #10  
Old 12-23-2013, 11:41 AM
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Join Date: Dec 2011
Location: S.E. Michigan
Posts: 3,464
Re: 308 Neck Sizing Issues

FL always. I don't bother purchasing NS does anymore. Waste of money.
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