As tempting as it is to call the turn minraise, it more than likely means you're beat here given the villain isn't giving up despite 2 streets of aggression from you.

I'm wary of firing the double-barrel against unknowns. Save em' for known tight players who are more likely to lay'er down. A flop c-bet call could mean slowplay, TPGK hands, draws, and any number of hands that loose players aren't gunna lay down to turn aggression.