I mostly use bronze, but I do use nylon bore brushes when applying an aggressive solvent intended to remove copper fouling from rifle barrels. Bronze is mostly copper and the solvents can degrade the brushes prematurely. Good bronze bore and chamber brushes aren’t cheap and I like to make them last as long as possible.

I’ll make a few passes with a bronze brush to remove loose debris, then dip a nylon brush in the solvent (Hoppe’s Bench Rest, Sweets, Barnes CR-10, Etc…) and make a few passes through the bore. I let it work for about 10 minutes, then wipe it out with dry patches. Most of these solvents have a warning about how long to let it soak. If the bore is heavily fouled, I’ll resort JB Bore cleaner and Bore Brite.

I follow that up with about 10 passes from a bronze brush, then a patch soaked in Hoppe’s 9 and then dry patches again until they come out clean. I apply a light coat of oil before storing the gun, but I wipe that out before shooting the gun again.

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