I have a screw in ball puller in my tool box for insurance, if I load a ball accidentally and forget to put in a powder charge I have had great success with removing the nipple and stuffing some powder in that way, then fire the gun. I never take my gun completely apart after shooting, I run the cylinder under running water, clean nooks and cranny's with tooth brush and rod/patch. Wipe down frame area with wet cloth, and swab barrel. I use plain cold or warm water. The gun is given a good spray with WD-40 or better yet, Remoil, etc. Oil gun as normally done with cartridge types, put back together.
This method of taking a gun completely apart, grips off, all screws out, is a good way to strip and bugger up the screws and shorten the life of the gun. If I had the situation where I only fired one or two cylinders and had to wait a few days to empty the gun of ammo, I would use the CO2 method, or just spray some WD-40 into the fired cylinders to inhibit moisture contact.