headed to pick up my new gun and plan to work the barell over with some steel wool on a dowel rod with my drill to clean it up a little.  i dont really have anything here to polish it with except some old wheel polish.  when i do this, do i need to remove the bbl?  i plan to sight in and then pattern with minimum shots..hopefully.  will running a good, clean bore snake through it after patterning be enough, or will i need tp run the steel wool in it again?