As stated Shooter Choice bore cleaner or Carb./ Brake cleaner will remove the factory preservative in the barrel. I like to clean with windshield washer fluid,others like soap & water. I use denathured alcohol to help dry out the bore after it's flushed out clean.A couple of wet alcohol patches then I reassemble the rifle after cleaning the lock.The last thing I do prior to putting the gun away is run a wet patch down the barrel soaked in Barricade. I have had no issues with rust in any of my rifles. :thumbsup: The next time i'm going shooting I run a couple of alcohol patches down the bore to remove any remaining oil deposits and then load the rifle...some may say it's over kill but it works for me :idunno: