With few exceptions, I always clean from the breech to the muzzle and it's just not a theory, it's good practice. I cannot think of any breech loader that can't be cleaned from the breech to the muzzle and I clean a lot of firearms.....Can you not break down a Buckmark and clean from the chamber, I've heard different theories.
At some point, the bore will needs some attention even if it's just a light swabbing. The point being made, is that .22 bores are cleaned too often and as this reply states, "At some point, the firearm will let you know what it needs."My vote is......Neither