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How would you rate this chamber job?

 
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  #1  
Old 07-23-2011, 04:29 PM
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How would you rate this chamber job?

Here are few pictures of fired brass through my new chamber, how would rate job done on my chamber? Would professional gunsmith notice that while cutting new chamber?



look at the end of the neck, I think its a print from previous chamber


this one I used candle to get soot on the brass to get better view what's going on in this chamber.
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  #2  
Old 07-23-2011, 05:37 PM
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Re: How would you rate this chamber job?

typically the shoulder area carries the most rings from the chamber reamer, mostly due to the angle of the cutting surface to the material, any imperfection in the tools surface is transfered to the shoulder. If a chip welds itself to the reamers cutting surface the rings will be more prominent.

Bore scoping during the chamber job is the time to find and correct these small issues. a light polish of the shoulder after reaming will also lessen the prominence of these rings.

Yours look quite distinct so my guess is he spun a chip or had some chip weld on the reamers cutting surface, I'm sure your smith would correct it if you brought it to his attention. One other cause is a barrel with a hard spot that cut difficult and may tear a bit. I had one barrel in 250 that did that so not real common.
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Old 07-23-2011, 06:01 PM
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Re: How would you rate this chamber job?

That's what I was told, hard spot and reamer got chipped...
Can this be contributed to the consistent fliers I'm having?
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Old 07-23-2011, 07:11 PM
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Re: How would you rate this chamber job?

Quote:
Originally Posted by Jinx-) View Post
That's what I was told, hard spot and reamer got chipped...
Can this be contributed to the consistent fliers I'm having?
The rings are not bad enough to hurt accuracy, They are only bad looking.

Rings on the shoulder will not hurt the extraction but if they are on the chamber wall
they can effect the extraction especially the hot loads.

As Coyboy said, inspecting the chamber durring the reaming process will catch this and can
be eliminated before head space is final.

This has happened to every gunsmith at one time or another and as long as it is caught
It is not a problem.

There are lots of reasons for this to happen and if you talk to the smith he should set the
chamber back enough to clean it up.

A good chamber leaves no marks on the brass, so I would rate it bad but fixable.

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Last edited by J E Custom; 07-23-2011 at 07:15 PM.
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  #5  
Old 07-23-2011, 08:37 PM
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Re: How would you rate this chamber job?

I guess I just have to wait for the reamer to get back, I understand PTG repairs them if they getting chipped...
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  #6  
Old 07-23-2011, 09:35 PM
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Re: How would you rate this chamber job?

Fliers I believe has to do with uneven neck tension created by something in the chamber neck area here take a look every brass fired through has exact signature at the tip of the neck, its not all away around just about 1/4 of the neck , and carbon escape also in exact spot...

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  #7  
Old 07-24-2011, 10:39 AM
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Re: How would you rate this chamber job?

Is this a factory barrel that's been rechambered?
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