I just bought this M&P 9 new and it seems, to have some copper in the bore. I used Hoppe's and let it soak a few minutes and the patches came out with a bluish tint. The user manual says not, to use ammonia solvents which I have some Barne's CR10 I use on my rifles. will this be too harsh of a solvent to use? so far all I have used is a Patch Worm and patches haven't gotten a proper kit for it yet. Should I just use a brush and Hoppe's and scrub it real good maybe? I'm new to pistols so I'm kind of lost here. Thanks!