Your question has no right, or wrong answer how you asked it IMHO.
If you are shooting like 100-250 Rounds, than I would think removing the lock, placing it in a pot, and soaking it in something like M-Pro 7, Hoppies 9, or some other firearms cleaner that will neutralize the black powder residue would work great. Heck you can even use a stream of Hot Water from the Kitchen sink.
Them put the lock in a warm oven on warm, or out in the Sun after you blow off the excess moisture. If you have nothing to blow it with like Air-In-A- Can, or the Reverse function of a household vacuum cleaner to blow air.
Tie the thing to a strong string, and play cowboy, like you are roping a cow, and the centrical force will remove the moisture.
Last Lube the Lock, and Replace and go shooting. Remember in the old day people live only to their 30's, and 40's so Locks, Rifles, etc. did not stay in an owner hands long. Also they got by cleaning stuff with Water, Oiler Oil, and Animal Fats.