I only use Natural Lube. I used to use gun oils and had some problems with build up in my barrell. I had been cleaning my rifle the same way for years, hot soapy water followed by a hot water rinse,then dry patching, then oiling.One day I was at the range and started having a tough time getting the patched ball down the bore. I used a spit patch or two and then dry patched it a couple of times. I was able to load only a couple of shots more before a ball got stuck down the bore about 12". I tried pulling the ball, andI broke the ram rod ( I split the rod where it was pinned). I took the rifle home and I had to find a piece of alluminum round bar and a hammer, well I finally got it seated all the way down. I took the rifle out back and fired it into the ground (it's great living in the woods). I then got on the phone and talked to a friend ( this was before Al Gore invented the internet) he told me to plug the nipple and fill the barrel with boiling water and let set for 15 min. then dump it out and do it again. Then I was told to get a bore brush and work it over until I thought that my arm would fall off. Well I got all kind of black hard "coal like " junk out. I cleaned it out for about 2 hrs. He then told me to never use oil again, he had been down this road himself, he told me about Bore Butter. I swabed it in really heavy and have never had a problem as I get it clean and dry and reapplied heavily. I will never go back to oil. This has been about 5 yrs. now. I do use a bore brush every time that I clean to keep it from builing up.