You don't need premium bullets to kill game, you don't need premuim bullets to kill game, you don't need premium bullets to kill game, need I say it again.
The premiums help if your getting impact velocities over 3000fps, but out side of the screaming magnums you don't need them.
I've killed and have seen killed literally hundereds of head of game, from moose to mice killed with plain jane old cup core bullets.
Shoot what is most accurate in your rifle and get good with it, the bullet going where it is supposed to is what kills, not all the glitz and galmour.