I've had good results with the 154's on deer. I have not tried it on elk. I would not be afraid to use them on elk and a 280 though.

It's been a while since I've used that combination, who knows, they may have changed the bullet construction.

I prefer classic.
Semper Fi
I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally