Is it okay to scrub back-and-forth with the brass bore-cleaning brush? I know that you should only scrub from the breech end towards the muzzle, but I mean pushing and pulling the rod. Someone told me that it should only be pushed through, not pulled back, because the bristles are angled for one direction only. I can certainly feel a difference in resistance that indicates this is true, like petting a cat's fur the wrong way when you pull the rod back. However, the "pull" seems to clean out the crud better and you have to unscrew the brush on every stroke if you only push. Seems to me that the softer brass shouldn't harm the steel of the barrel even going "backwards" but I don't want to damage the gun.