I've shot elk with Hornady Interlocks, Speer Hot Core's, Barnes TSX & TTSX's, Nosler Partitions, Ballistic Tips, and Accubonds. My current load is a 165 Sierra Game King... they all work.

Elk are no harder to kill than anything else if you hit them correctly.

If I were trying to decide between a 180 NBT and 168 NBT, and they shot equally well, I'd go with the 168 because it recoils less.

“Perfection is Achieved Not When There Is Nothing More to Add, But When There Is Nothing Left to Take Away” Antoine de Saint-Exupery