First off welcome to the forum, and nice avatar, man! (The Dude Abides)
Four hours does sound a bit long for BB's, and did you spritz them during the cook? I usually get my BB's to finish in three+/_ hours or whenever they're done, and I always spritz with apple juice. I find that helps a lot since they're pretty lean to begin with. What cooker were you using? Method? We needs ta know!
UDS'55&16, Akorn, Bar-B-Q Kettle, mini WSM, Drum Grill. I'm JD.