450
Congratulations on you new double.
I have taken a lot of game with my 9,3x74R.
The 286gr Woodleigh is my favorite soft.
It works for game from coyote to cape buff. If I could use only one soft that would be the one.
The 286 Nosler Partition works great as well.

I have used the 270 Speer for deer and wild pigs also with excellent results.