To me it seems the first thing that affects accuracy and reliability with BH209 is the carbon that builds in the hole below the primer in the breech plug. When i am shooting, by and by, the rifles start having more blow back than normal. Then it is time to drill out the carbon. In my Omega i use an 1/8" drill, and in my Accura i use a 7/64" drill. I guess i only clean the barrel if i know i won't be shooting any time soon. Some few have had problems with their barrel rusting; i believe this is because they used a traditional black powder solvent to clean their barrel. I believe one shouldn't use traditional water based black powder cleaners or lubes with BH209. I believe using only oily products intended for center fire rifles will be best when using BH209. I never swab at the range. Usually i never clean my rifles during hunting season. When season ends they get a good cleaning and they stay clean until i get the urge to shoot paper, which seems to happen relatively soon. Then when the weather turns hot, i quit shooting paper, and give the rifles a good cleaning. When the weather cools it is time to get ready for hunting season again.