SmallCaliberCentral

Got the Carbon out since I found a Nylon brush. NYLON brush yields VASTLY different results. Wet patch following the brush comes out clean. I don't know what the black stuff is following a phosphor bronze brush, but Remington and someone here too thought I was having this problem.

I almost changed a barrel because of this same phenomenon.

On the bright side you probably have the cleanest rifle barrel in the world.
Thats an accomplishment of sorts.
NOW GO GET IT DIRTY!!!

You're right. I did get it clean. But not without MAJOR, MAJOR ELBOW WORK!