Break-free may work but I don't think it's quite as good of a powder solvent as Hoppe's 9. And the viscosity is certainly higher so it may not flow into the lands & grooves as well. Get some Hoppe's for the bore. Conventional procedure is to alternate wet patch then dry patch until they come out clean. Before I get to the patches though, I put several drops of Hoppe's down the barrel (using a dropper bottle) and rotate the barrel around until the liquid coats everything. Then I'll just let it sit and work while I clean other parts of the gun.
If I don't anticipate shooting a particular gun for a while, I'll wet a patch with Break-free and run it through the barrel, to give it a light coat of oil. Just run a clean patch through to remove any oil/debris from storage before you shoot it again.
If I don't anticipate shooting a particular gun for a while, I'll wet a patch with Break-free and run it through the barrel, to give it a light coat of oil. Just run a clean patch through to remove any oil/debris from storage before you shoot it again.