Buy several boxes of ammo in different bullet weights. Shoot the gun and let the gun tell you what it likes. No one here can tell you which one will shoot the best in your gun. The 150 gr. stuff will recoil a little less than 180 gr. stuff, but you may find that the 180 gr. loads shoot the best.
Shooting the rifle is the only way to know what the gun likes and what load you feel the best with. Hope they are the same.
All it takes for tyranny to succeed is for good men to do nothing.