Is this normal? When I clean my .223 I run 2-3 wet patches until the last one comes out pretty clean. I then run a nylon brush down the barrel several passes. Then the first wet patch or two comes out black again. I then run another wet patch or two until no trace of black on the patch. I then repeat the process with the nylon brush. I can do the numerous times and the first wet patches that come out will be BLACK.