Videos talk about copper fouling, inaccuracy, and bore cleaners. Other vids. talk about microscopic imperfections in the bore being filled in by copper as you shoot, increasing accuracy. These latter people say no bore cleaners. CLP is not known as a copper remover and it is what I use. I have never done the bore cleaning thing with harsh solvents.

Many of you guys are/were military and or law enforcement and so use the M4 as your tool of trade. What do you guys do? Do you use a designated copper/bore cleaner? If so, after how many rounds? Or do you subscribe to the theory that no copper cleaner is necessary?

What do you do?