메이저리그중계 Explained in Instagram Photos
https://www.evernote.com/shard/s736/sh/fbc32502-ad0b-05e1-92a2-008dba31b64d/d4986994c7cf5b84fefd7d95561537bd
Make use of a bronze wire brush for normal bore cleaning. When removing copper, significant lead fouling, or plastic shotgun wad fouling utilize a nylon brush with Shooters Option or related bore cleaner.