Another function of the lube is to keep the fouling in the bore soft. After firing the muzzle should be wet, if it's not you're not using enough and you will get hard fouling in the bore.
I use tallow with a small amount of Castrol R (castor oil) to soften it slightly, this doesn't get blown away when the chamber next to it is fired.
After firing 30 or more shots, one patch through the barrel and bore is shiny.
Daz