Now that I've killed my FIRST elk, I am now an expert But seriously having killed a few elk-sized animals, I'd choose ANYTHING but a Sierra. All I can tell you is that three of us used TTSXs and one used a Nosler AB, and we all had great results, so I would pick the bullet your rifle shoots best, except the Sierra.
A good principle to guide me through life: “This is all I have come to expect, standard lackluster performance. Trust nothing, believe no one and realize it will only get worse…”
But seriously having killed a few elk-sized animals, I'd choose ANYTHING but a Sierra. All I can tell you is that three of us used TTSXs and one used a Nosler AB, and we all had great results, so I would pick the bullet your rifle shoots best, except the Sierra.