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Old January 31, 2013, 07:08 PM   #15
PetahW
Senior Member
 
Join Date: September 19, 2008
Posts: 4,679
I used Hoppe's #9 Copper Solvent on my son's stainless T/C Encore .300 Win Mag bbl, after he shot about a million copper solids through it.

It didn't take very many passes, before patches came out clean, ILO blue-green.





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