More on Copper Fouling
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Old 08-27-2010, 12:45 PM   #1
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I have discovered that there is a difference in the amount of copper left in my bores depending on the choice of bullet that I shoot.
I clean the rifles after every range session and I am seeing a definite increase of fouling from the Nosler Accubond than from the Berger VLD.
Both bullets give excellent accuracy (to my ability). I am using the Bergers in my .300WM and the Accubonds in .308 and .30-06.

Does the type of powder have any bearing on amount of copper? I am using H-1000 in the .300 and IMR-4895 in the other two.
Or--is it that some bullets just foul worse than others? I have about decided that when I use these Noslers up that I won't buy more. The .308 and the .30-06 did not seem to get fouled as heavily when I was originally shooting the Sierra Matchkings.

I know from other threads that some barrels simply foul worse than others. Both the .300 and .308 are the newer Milspec 5R rifling and the .30-06 is an old M700 with carbon steel.

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Old 08-27-2010, 04:25 PM   #2
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Each individual barrel will foul differently. Even thought he .300 WM has more velocity (theoretically) the barrel could be smoother and collect less fouling. Different powders have different pressure curves. Differing pressure curves lead to different accelleration rates of the bullets in the barrel. This can lead to differing levels of fouling. It is impossible to say if the bullet has anything to do with the equation as they are different guns. Kind of an apples/oranges situation.

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Old 08-27-2010, 09:38 PM   #3
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Each barrel fouls differently and any change in jacket alloy percents will foul different. I expect that folks shooting pure copper bullets will see more fouling then with gilded metal jackets.

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Old 08-27-2010, 09:50 PM   #4
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Actually with the monometal CNC bullets I've been dinking with with lately there seems to be less copper fouling than with the copper jackted lead bullets.

http://www.gsgroup.co.za/techdata.html

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Old 08-27-2010, 09:58 PM   #5
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Quote:
Originally Posted by mrm14 View Post
Actually with the monometal CNC bullets I've been dinking with with lately there seems to be less copper fouling than with the copper jackted lead bullets.

GS CUSTOM BULLETS - Recommended Use and Technical Data

Damn man you have got to stop drinking with those bullets.. a few shots and they will get you in trouble.
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Old 08-28-2010, 02:37 AM   #6
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Damn man you have got to stop drinking with those bullets.. a few shots and they will get you in trouble.
I always have a few shots with them and they do tend to be good dinking or drinking buddies.
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