Cleaning the carbon ring out of your chamber’s neck?

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K0na_stinky

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Cleaning the carbon ring out of your chamber’s neck?

I’m just wondering what everyone is doing to keep the carbon build up at the end your chamber's neck under control and how to remove it when it gets out of control.

I started getting some crazy velocity extreme spreads. I believe it’s due to the carbon in my neck. My fired cases have a taper right at the mouth.

Thanks
 
My 200 round count custom 308 puts a slight taper on the brass. I have now trimmed back my brass very slightly and after the SPRA June 5-6 match, I will know if that cured the problem.

At least in my rifle, I can't see it being a carbon issue with such a low round count. The longest it went without a cleaning was 175 rounds.
 
Shooter ----/ said:
My 200 round count custom 308 puts a slight taper on the brass. I have now trimmed back my brass very slightly and after the SPRA June 5-6 match, I will know if that cured the problem.

At least in my rifle, I can't see it being a carbon issue with such a low round count. The longest it went without a cleaning was 175 rounds.
Click to expand...

My round count is roughly 600. I went about 300 rounds without cleaning.

My problem is my normal cleaning routine doesn't get right into the square end of the chamber.
 
JB Bore Cleaning Paste. A Benchrest Shooter and very experienced re loader put me onto that 45 years ago.
 
Found the video, not much to it but thought I'd share:

Www dot brownells.com/.aspx/lid=13219/GunTechdetail/Getting-the-Cleanest-Bore-Possible

I like to use an undersized brush covered with a patch and a little bore paste to work the first 6" of the barrel. It's probably time to get a bores cope and see what kind of build up is really in my rifles..
 
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dusticles said:
Found the video, not much to it but thought I'd share:

Www dot brownells.com/.aspx/lid=13219/GunTechdetail/Getting-the-Cleanest-Bore-Possible

I like to use an undersized brush covered with a patch and a little bore paste to work the first 6" of the barrel. It's probably time to get a bores cope and see what kind of build up is really in my rifles..
Click to expand...

I'm not talking about the bore.

I'm looking to clean the neck of my chamber.

Thanks though.
 
K0na_stinky said:
I should have asked more specifically.

How do you get into the square corner at the end of your chambers neck?
Click to expand...

I have never had much buildup in that area...

JB Bore Cleaning Paste. Use it on a brush or a tight patch or both... and then dry patch it clean.

 Anything left after a good cleaning with JB will not matter...
 
guntech said:
I have never had much buildup in that area...

JB Bore Cleaning Paste. Use it on a brush or a tight patch or both... and then dry patch it clean.

 Anything left after a good cleaning with JB will not matter...
Click to expand...

My current cleaning technique doesn't touch that area of my neck and I don't think what you are describing will either.

Also it does matter because currently the neck doesn't move away from the bullet when firing. That jacks the pressure up pretty good. Its not safe.



Here's how I cleaned it. I'm not to happy about it but I think I got some of the carbon out of that corner.

I took 1 part of a 3 piece cleaning rod with a 308 brush. (my rifle is chambered in 260rem) I then took my drill and carefully spun the brush in the chamber.

Visually I can now see a square corner at the end of the chamber. Once I can get out to test it I will measure my fired cases to see if there's a difference.
 
K0na_stinky said:
My current cleaning technique doesn't touch that area of my neck and I don't think what you are describing will either.

Also it does matter because currently the neck doesn't move away from the bullet when firing. That jacks the pressure up pretty good. Its not safe.



Here's how I cleaned it. I'm not to happy about it but I think I got some of the carbon out of that corner.

I took 1 part of a 3 piece cleaning rod with a 308 brush. (my rifle is chambered in 260rem) I then took my drill and carefully spun the brush in the chamber.

Visually I can now see a square corner at the end of the chamber. Once I can get out to test it I will measure my fired cases to see if there's a difference.
Click to expand...

I think you need to clean your rifle regularly more often to prevent such a build up... I never noticed such a build up in my rifle or others who usually cleaned before 40 rounds were fired... or trim your brass a bit shorter so it isn't so close to the square edge...
 
guntech said:
I think you need to clean your rifle regularly more often to prevent such a build up... I never noticed such a build up in my rifle or others who usually cleaned before 40 rounds were fired... or trim your brass a bit shorter so it isn't so close to the square edge...
Click to expand...

I will consider cleaning more often. Maybe every 100 - 200 rounds I will clean.

One problem with trimming the cases shorter is it will allow my carbon ring to grow farther down my neck. It may temporarily fix the pressure issues but they will come back sooner or later.

Can you measure one of your fired cases to see if you have tapered necks? All my rifles have the same build up. So I might be doing something different then most people.
 
K0na_stinky said:
One problem with trimming the cases shorter is it will allow my carbon ring to grow farther down my neck. It may temporarily fix the pressure issues but they will come back sooner or later.
Click to expand...

If the end of you case has a bit more clearance, you don't have to get the 'edge' totally clean. Normal cleaning will remove all what has 'grown down the neck' ... all but a little on that 'edge'.
 
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