milanuk said:"How would it be possible for a softer metal to damage a harder metal?"
Same way water erodes rock... time and pressure and repetition.
That said, I use primarily Wipe Out w/ no brushes, but every so often I do hit it w/ a good quality bronze brush and some Kroil to knock out any accumulated crud.
dreever said:On this barrel I started with no brushing. I was getting no copper, but it took a lot of patches to get all the powder and carbon out to the point of pure white patches with no black streaks.
I now use two wet patches then five strokes of a Montanna Extreme Nylon brush,they are stiffer than others) removing the brush each time it exits the muzzle so as not to hurt the crown by pulling it back through, then normal patching which gets it clean much faster. I suppose sooner or later I may have to use a bronze brush but untill that time the nylon seems to be doing the trick.
My solvent of choice is Pro Shot Copper Solvent IV which is almost the same as Bore Tech Eliminator but a bit more user and enviromental friendly.,Check those MSDS sheets on any solvent you plan to use).
Danny