"Which bullet for the Creed"
I used the new Federal Fusion 140 gr. on a big Roosevelt cow elk.
If your using off the shelf ammo, this is a good option.
Double lunged, complete pass through. She ran off with the rest and was found a short distance away. I'll use them again.
If you roll your own, any of the 140-ish gr. bullets should be fine.
Place them properly and get on with packing it out.