Pull the lock and set it aside. I put a tootpick in the vent hole and fill the barrel completely with water. I let that sit while I clean and oil the lock....maybe 8 minutes. Then, I tip the barrel over and pull the tootpick to let the water run out. I repeat the water 2 more times, but only fill about half-full so I can shake the rifle for a rinse.
Then, I put patches down the bore until they come out nice and clean. The first patch I put down is 91% alcohol to help the bore dry faster with the subsequent dry patches. I recently started using Rem-oil as a protectant in the bore. I tried bore butter, but I'd fight rust later on from time to time.