Impossible for anybody to tell you with certainity asthe only way is trail and error. Every rifle is different!

The 150gr bulletmaybe be the flatest due to MV it produces but in your rifle the 165gr bullet might prove more accurate. Therefor you would be better suited shooting the 165gr bullet and learning how to compensate for longer distance shots.

You'll have to look at matching bullet/gr sizes to usage andtry them.