I had a slight adrenaline rush when my newly hand loaded .45 Colt ammo wouldn't chamber all the way in a new-to-me Ruger Blackhawk I traded into. Made me wonder what I had done wrong. Everything measured correctly, so I checked it in the cylinder of a different revolver. Fit perfectly. Turns out the chambers of the Blackhawk were filthy, with a lead ring just at the case mouth. A little elbow grease and now all is in order. But it made me think. When you sell a gun, do you clean it first or not? My practice has been to detail clean any gun I am parting with, especially those I am shipping somewhere. I want the buyer to have confidence that I took care of the equipment (I do) and have the pleasure of receiving a range-ready firearm. What do you do?