well, here it is. i am in the process of cleaning several of my rifles shot today and they have been all shot before. for this topic i will be using the 223 ar15 as my problem. i broke the barrels in as described by many folks, sites, and felt like i did a good job of cleaning, firing once, cleaning firing once, cleaning and so on and so on for at least 50 rounds. i had nothing but time for the task, it took several days of range time and alot of people looked at me like i was nuts. whatever, here is my question. no matter how many times i do it i now always have copper in the barrel. i use montana extreme products, the bore solvent and the copper killer. these both have a serious ammonia base and the copper killer when used will always produce a blue patch when allowed to soak for a few minutes. i dont think the copper will ALL ever be removed. do you think that this is normal? can all the copper ever really all be removed from a barrel? the guns i question have all be shot at least a few thousand rounds. what do you think?