When in doubt, make them a little tight, as they break in, they can only get loose.
In any properly functioning bearing assembly, all the bearing contact the cone/race at all times, distributing the load and shock loads evenly. If the assembly is loose, then all the load is taken by one or a few bearings which concentrates the forces and leads to premature wear.
Il faut de l'audace, encore de l'audace, toujours de l'audace
1980 3Rensho-- 1975 Raleigh Sprite 3spd
1990s Raleigh M20 MTB--2007 Windsor Hour (track)
1988 Ducati 750 F1