I cleaned a buddies M44 Mosin using long stainless wire brushes I got a Harbor Freight.
They sell them several in a package.
He had fired some ancient corrosive ammo and then then just chucked the rifle in the closet.
It was really sad. I tried conventional cleaning methods and finally resorted to the wire brushes.
It took quite a while but I got the barrel cleaned up pretty well. It was still pitted, but clean.
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