A cloth patch needs to be lubricated. It not only protects the cloth from tearing or wearing holes from the lands as well as sealing gas pressure behind, it leaves lube in the bore & in the fouling to soften the fouling so the next shot is not effected and the fouling. As each patched ball travels down the stube, the fouling is wiped from the bore. The lube from that patch, softens the fouling left by that shot. This happens over and over and over, and the bore never builds up fouling - what I like to call, shooting cleanly.

If the fouling builds up, caking and reducing accuracy, the lube isn't good enough, or there isn't enough of it.

If the rifle shoots low, the front sight has to be lowered (or the rear sight is raised) to raise the point of impact.

If the rifle shoots high the front sight must be raised (or the rear sight is lowered) to lower the point of impact.