You absolutely must work up the load for your rifle. No two rifles, even two identical, consecutively serial numbered, rifles will shoot the same ammo the same way. When testing loads, shoot off the most solid rest you can off a bench at 100 yards. When you find the most accurate load for your rifle, move out to longer distances, taking the ballistics into consideration. You have to know how far your bullet will drop at the various distances to adjust your sight.
Look into a 168 grain match bullet with IMR4064 for distances out to 600 yards. A 175 grain match bullet with the same powder for distances past 600. The 155 grain bullets are also known as 'Palma' match bullets. They'll do, but you'll still have to work up the load.