This is not a matter of grease finding it's way - there should be enough grease to completely seal in the balls. Again, if it's a properly broken in bearing set it will be quite smooth. On a new set you have to tolerate some roughness - even Campy will be better after the bearings run a smooth track into the machined surface. If you adjust on the loose side at all you will be less likely to get a proper wear-in. I've owned many bikes, worked on thousands, which means I've done a lot of bearing adjustments and overhauls. Very few could not be adjusted acceptably with no play if the parts were proper. A new bottom bracket willdevelop play while smoothing out and have to be readjusted to maintain and atke advantage of proper break-in.