I've taken several 200# plus Indiana Whitetail with the 357. ( 180 grn XTP loaded with 14.3 grns on N110, around 1400fps from my BH, 1700+ from my Marlin)
It's more than adequate.
If you put a stout Magnum load ( 357, 41, 44) in the right place, it will do the job.
My 6.5in Blackhawk is an...