TT got in trouble

Full Tilt 11$

blinds 50/100
I´m in MP w/ TT, BB has been pretty active so far.
ME: 2,7k
BB: 8k

I raise to 250, because sb is not posted.
BB calls.

Flop: Ks 8d 5s
he checks, i bet 300, he c/r to 1200, hero??

what range would u give him here?