I clean after every range session. I use Tubbs Final Finish Bullets in all of my barrels and it makes cleaning a snap. I will use KG-12 and then check for additional copper fouling. If it is stubborn then I give it a pass with JB's bore paste. That is rare. I run a patch with Gun Scrubber down the bore before going to the range and that's it. I do not shoot any foulers. I have not found it to be needed. Prior to using Tubb bullets to lap my barrels it was a whole different routine.