Hi friends. I have a question here and hope somebody can give me a good answer. Wich bullets on the folowin list should be cosidered premium bullets?

Swift: A-Frame, Scirocco
Remington: Core Lokt, Core Lokt Ultra
Nosler/CT: Ballistic Tip, Ballistic Silvertip, Accubond, Failsafe, Partition, Partition Gold
Speer: TB Bear Claw, Grand Slam, other Speer Bullets
Sierra: Game King, Pro Hunter, other Sierra Bullets
Hornady: Interlock, Interbond, SST Interlock, A-Max, V-Max
Barnes: Triple Shock, Solids, X-Bullets, Barnes Original
Norma and Lapua Bullets,
Hunting Bullets from other manufacturers

I realise that some of these are not thougt of as premium. What makes a Bullet being a Premium Bullet?

Thanks,
Kakali