Ruger MKII Cleaning
A blast of aerosol brake cleaner into the lock work, work the mechanism to allow it to seep in, and wipe away. Then a bit of powdered graphite and a touch of grease on the hammer notch and the pistol was ready for reassembly. The blast shield was working well. It had an eigth of an inch thick layer of black soot caked on it. There was no gritty trigger. Underneath the blast shield, the trigger was as clean as a whistle. However, around the hammer and sear, so much crud was built up that the trigger reset was sometimes delayed. My usual Ruger MKII post shooting clean-up consists of a poke around the chamber with a bronze brush and patch, a bore snake and a wipe down. It takes many, many rounds to build up the residue of shooting in the rear of a MKII.
Far too many people believe they must field strip these pistols every time they shoot them. I know several shooters who have continued to shoot MKIIs with no cleaning what so ever. The MKII design allows for a minimum to no maintenance. It is truly one of the most durable and simple pistols ever built.