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Excessive carbon build up?

 
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  #1  
Old 08-07-2010, 03:43 PM
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Location: Dallas,OR
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Excessive carbon build up?

Hello, I'm looking for advice. I shoot a 7mm using H1000, 215m,WW brass, and after even 30rds. down the barrel there is very little carbon build up. This is a near max load, too. In my 243Win shooting IMR7828ssc,215m,WW brass I seem to get a lot of carbon fouling, not sooty like I've seen with Retumbo, but still a lot after shooting only 12rds. I use GM Top end to get the carbon out when cleaning and it takes at least a dozen patches to get it clean using a 15min. soak in between patches. There is little to no copper fouling. Should I look at a different powder? What causes lots of carbon build up?
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Old 08-07-2010, 03:53 PM
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Re: Excessive carbon build up?

What bullets?
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Old 08-07-2010, 04:47 PM
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Re: Excessive carbon build up?

You will get a carbon builup in the throat right in front of case normally from all firings. Most people are not even aware.

use a sinclair case length gauge in a shortened case to actually measure what you chamber requires as max case length and you might find that you can eliminate most of that. http://www.sinclairintl.com/.aspx/pi...er_Length_Gage

SLIP 2000, Montana Extreme and Wipeout all take it out.

BH

Last edited by BountyHunter; 08-07-2010 at 04:52 PM.
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Old 08-07-2010, 06:46 PM
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Re: Excessive carbon build up?

Thanks for the replies. I'm shooting 95VLD's and 95 Nosler Ballistic tips. Both are seated 0.010" off the lands. My concern is the possibilty of increased pressure from the carbon. I was using the same batch of powder in the 7mag and it didn't carbon up that one.
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Old 08-07-2010, 08:35 PM
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Re: Excessive carbon build up?

That is a valid concern and reality.

BH
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Old 08-07-2010, 10:02 PM
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Re: Excessive carbon build up?

Issoi is what i use on carbon build up. I use a brush that is under sized by at least one caliber and a patch on top of it. I will basically patch lap the barrel for about 20 strokes after i have cleaned the barrel with a copper solvent. Then i will remove that patch and repeat once or twice if needed. I usually only have to do this every 200 rounds or so. Not sure why its happening so quickly for you.

I have found that powders mean the most on how fast it happens but if its not doing it in a different gun it may just be the finish of the bore thats causing it. I use a kit on guns that copper a lot and it has helped a ton. It might help you. Its called smooth kote and it can be found here in there armorers kit. Sentry Solutions - Dry Lube - Tuf Cloth - Gun Care - Knife Care - Oil Free - Rust Protection. Follow the instructions on it and it has helped a few guns of mine a lot!
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Old 08-08-2010, 07:18 PM
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Re: Excessive carbon build up?

Over the years I have used numerous products to remove carbon, but never satisfied with any of them. Recently, I have been applying Lucas automotive engine treatment. They advertise carbon removal on the can. I simply dip my nylon brush in it, and scrub the bore several times. Nothing caustic in it, so you can let it sit for several days before wiping clean. So far, I am pleased with the results.

If a carbon ring exists just ahead of the case mouth, it can sometimes be felt as a slightly tight area when dragging a tight patch over it. Carbon rings can be real stubborn. Try turning a brass brush with your favorite solvent over it twisting the cleaning rod 360 degrees several times. A bore scope can help this task.
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