Didn't see it asked before (I hate to ask questions that have been asked/answered just a day or so before).

You attack with BCF. You roll a 12 on the attack (crit hit). You roll a 6 for the BCF roll.

Is the damage 7? (6+1 crit hit)?

Thanks in advance!!

It is 7. The BCF roll sets the damage dealt to 6 and then the critical hit increases that damage dealt to 7.

Yes. On a crit hit, you add 1 to the 'damage delt'. In the case of BCF, 'damage delt' is equal to the die roll, so you add 1 to that.

Hope this helps.......