there's no such thing as seasoning a modern day gun barrel....is it made of cast iron no then it does not need to be seasoned....there's a thing call lapping a barrel....if your talking muzzleloader of any kind then wrap some 0000 steel wool around your cleaning jag and with some gun oil like a cleaning patch and run it up and down bout 50 times....what this does is take off the little burrs that come from rifleing a barrel that are left on the top of the lands of the rifleing....if your comeing up with cut patches after once down and up with your wiping after the shot you may have this problem....like i did have with my T/C hawken barrel....some 0000 steel wool and oil and 40-50 passes with your ram rod it should smooth out your barrel....and unless your barrel is made of cast iron your can't season a barrel....even with my flintlock and cleaning it with hot water to get out any black powder fouling i make sure it's dry and run a patch of gun oil down the barrel just like you would do with a centerfire rifle to keep it from rusting............................bob