Well I'd go lighter...
With the monolithics, velocity adds much to the terminal effects. A faster moving 168 TTSX will hit harder and provide penetration to spare.
This is the Lazzeroni philosophy that has proven to be false many more times than it has been true.
IMHO I would use a 200gr AB........whatever bullet you choose in this weight class I have found H1000 the powder of choice in my rifles.