I like to hunt on a fowled barrel, depending on the rifle I am using. I always make sure before season that I know where the rifle will hit on a clean and fowled barrel. I then fowl it the day of the hunt, and I used to clean it that night. After some of the corrosion tests I ran recently, I think swabbing the barrel out for my sabot shooters, or just leaving the fowled White alone for the next day, will not endanger the rifle for rusting. I am going to hence change some of my cleaning habits.