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Old December 30, 2012, 08:57 PM   #9
Senior Member
Join Date: December 10, 2012
Posts: 3,718
If its not a hand lapped barrel chances are you will see this. Shoot too many rounds without cleaning through a hand lapped barrel and you will see it. Just clean it till it comes out. It took me 4 days to get my 257 wby clean. To me, it s clean when Montana extreme sets in the barrel 45 minutes and the patch comes out with absolutely no blue on it. Get a Rod and use a good copper solvent. I recommend Montana Extreme but there are many as good and probably some better, but it works for me.
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