Never had steel wool fibers cause a problem if care is taken during use and they are flushed/swabbed out. Plus, if rust forms on steel wool fibers, wouldn't rust form on other steel parts of the gun anyway if allowed to do so?
Also, some mentioned Chore Boy for bore swab material. It works well for removing heavy leading- just make sure it is 100% copper. Some isn't. And I don't think bluing is on bore surface so use of steel wool wouldn't affect bluing there anyway
- just a straw man argument. I would be much more worried about caustic bore cleaning chemicals damaging bluing or bore surface (and wood stock finish for that matter) than steel wool. Brass or bronze wool also works for removing plastic fouling... for those "squeamish" about steel wool
. All in all, plastic shotgun bore plastic fouling removal is relatively easy.
Rust on bore surface is a much bigger and tougher problem because rust is harder than most steels and has already done damage. Rust can be caused by neglect where moisture from condensation is trapped underneath bore deposits and fouling. Pays to keep bore clean and protected when not in use. Heavy copper fouling can also be a tough one to remove. Carbon fouling is one of the most often overlooked. Carbon fouling is hard and tenacious. It commonly builds up in the throat and just ahead of chamber. It's a common cause of accuracy and function issues in some rifles and many handguns, revolvers and 22 rimfires. Carbon fouling removal also requires mechanical means like serious scrubbing with bore brush or aggressive swab material. Spinning a bore brush or steel wool (or brass wool if shaky kneed
) swab is one of the best ways to remove carbon ring from handgun cylinder chambers and throats. Carbon is non-reactive so is similar to plastic in that it resists removal using only chemicals.