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Copper fouling is fairly common in a new barrel, until you get enough shots down it to smooth it out. Expect accuracy to increase after the first hundred shots. In the meantime, clean the barrel with a good copper solvent. Put it on the metal with a patch, let the solvent work for 10-15 minutes, then start running patches. Look for a blue-green color. When the patches come out clean, you've removed the copper.
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