Brand of ammo, not rifle? Hunting what, deer, elk?
Any reputable brand is fine; my experience has been that I want a semi-premium bullet that doesn't come apart at magnum velocities and make a mess. I prefer 180 grains, but many people prefer lighter bullets for deer. Just remember, the lighter it is, the higher the velocity, and the bigger mess if it's not a tough bullet. Nosler Partition or Accubond, Barnes X, Swift Scirocco, Hornady Interbond, Remington CoreLokt Ultra, Winchester Partition Gold, etc.