Maverick223
Member
You got it, brass is just copper and zinc (with some other trace alloys added for desired properties).
That's why KG-12 was my first choice, but any ammonia based copper solvent left long enough to eat away a rod will cause some damage (I've never left any long enough to find out exactly how much and haven't any intentions of testing my luck), even a comparably weak one like Hoppe's No.9-BR. either way, it still beats throwing away a barrel that *might* be salvageable.Would be a terrible choice.
Any ammonia bearing copper solvent strong enough to eat a brass cleaning rod 16" deep will ruin the barrel if left in it long enough to do it.