I've always had good results with Federal ammo. They have a load with the 160 Nosler Accubond that has 1548 foot lbs. of energy at 600 yards at 5000 feet elevation. It is probably what I would try. Nosler bullets usually aren't too finicky and shoot well in many rifles. It is a premium bonded bullet that would hold up well on an elk's shoulder. I shoot the 160 AB in my 7RM but they are handloads. They shoot pretty well.