Best gun for hunting elk

[Starr]

I what is your suggestions for the best type of riffle to be hunting elk. My husband seems to think that the 30 30 will do fine but since he handed me the 22 to kill the llama Im not sure that he really has a clue.
My daughter has also expressed interest in hunting, she is 19, so I think this may end up as something that we actually get to do this fall.
I have a nice compound bow as well but I am not sure about hunting with that yet. The several shots it took to put down the llama will be with me for a while and I dont want to make that mistake with the bow.

Starr