I've not used the Creedmoor on elk, but have certainly used similar cartridges. I've thought about building one, and if I did its first choice for elk would be the 140 Partition. If it didn't shoot that the 130 Accubond or 140 Ballistic Tip.

If it didn't shoot those it would get rebarreled. laugh

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