I have only killed two with a rifle and four with a bow, so I’m not an expert.
I think there are much better cartridges for elk, than the 6.5 creed.
I used a 338 Win mag and a 45/70. If I went again, I would use a 30 cal or larger.
I have the same dilemma--I can never decide if I want to use my 2 blade or 4 blade Zwickeys in 30 cal...........