Of your choices either the 300 PRC Hornady ELDX 212 or 7 PRC Hornady ELDX 175. Although since I handload I'd want a tougher bullet and would probably use a similar weight Nosler Accubond as a balance for close range weight retention and long range performance.
I have had good luck with 200 grain Nosler Accubonds out of the 300 Win Mag. My experience on 4 Canadian Moose 20 - 250 yards was watching them all fall after the first shot, (3 dropped where they were standing or with in a few steps, 1 jumped in the river and swam about 50 yards)