barrel break-in ,load developement,scope sight - in , all done in the same day or two ,for me as has been posted,i clean the barrel at the end of the day on custom barrels,factory barrels i clean even less. my big game hunting rifles i wipe these rifles down and clean the barrel once a year or two . break in is a myth and stressed by manufactures who sell cleaning products for rifles,shotguns,pistols or whatever.
