No, Tamid, it doesn't clean it at all, but it takes aways he ability of leftover b.p. deposits to do harm to the bore, for a short time. I learned that trick at my first NMLRA Nationals shoot, in 1983. Many of the top competitors, if they were going to start back shooting the same gun the next morning, would swab it out good and thoroughly saturate the bore with WD 40. It keeps anything left in there soft, and a couple dry patches will get you right back to shooting next morning.

It basically just removes all the moisture, and "deactivates" the residue.

SRH

May God bless America and those who defend her.