Careful what you say there about NYLON. HA! My Dad worked 37 years at the world's largest nylon plant in Martinsville,VA., for DuPont. Union came in, they eventually shipped it overseas, and it was a ghost town in 10 years. Employed 5000 people at one time. Seven story building, chemical in the top story, and product coming out below. Now it's a park with no buildings.
Maybe I'm not anal enough over barrels but a boresnake is all I use on all my guns. Three weeks ago I took my rifle out since January, and put three shots in the bulls eye at 100 yds and quit. I routinely throw them in the washer inside a big sock.