Bore Butter[:'(]
Seriously though, some people love it andthat's great if they do. I have no use for it. I use Rem Oil. BirchwoodCasey has good products as well. When you are ready to shoot it next, you will want to run a wet patch or two down the bore followed by a couple dry patches to get the excess oil out, then pop a couple caps/primers.
cayugad I'm sure will catch this and give you his detailed procedures but my advice would be to leave the BB alone.