Are you asking about bullets or loaded ammo?
Either way, because each rifle is different, the only way to know what is best in YOUR rifle is to try several different brands/bullets.
A 308 with 180 gr bullet is an excellent caliber/bullet for both deer and moose. That is what I usually use. And a cheap pointed, flat base bullet will do the job.
If you shoot factory ammo, buy a box of Winchester, Remington and Federal and shoot a test with each. Shoot from a rest at 100 yards and try 3 of each, letting the barrel cool. If one seems better than the others, you are ready to practice and hunt.
If you reload, buy 2 or 3 different boxes of 180 soft point bullets and try them. I have had excellent results with the Hornady pointed flat base.