They are generally tuned to any of the following:

EADGBE (Octave down)
7-String Legion
Quote by TheJem
Justice4AllOne pretty much mentioned all of my ideas so yeah...pointless pun post.

Quote by MightySumo
Thanks fer settin me straight on that Justice

Quote by oneblackened
I was thinking that too, Justice usually seems like a pretty knowledgeable guy.
i was thinking about a 7string as well, i was just curious about tunings for a baritone, will it sound ****ty if you tune it up to a drop B tuning (BF#BEG#C#)? or even as high as drop C? (cgcfad)? because i'm looking to have better quality in a deep tuning rather than just getting even higher gauge strings for a normal 6string
I know a band who used to tune their Baritone to drop C and it sounded fine. More 'ballsier' than a regular guitar tuned to CGCFAD.