https://thebiggamehuntingblog.com/65-creedmoor-vs-308-winchester/
at shorter distance, the 308 has more energy than the 6.5CM. which is why i'm not ready to get on the 6.5CM boat. i very rarely shoot past 100 yards, and when i do its maybe out to 300 yards, so my 308 does just fine and is very accurate out to that distance
I've never shot a 6.5CM, so all my knowledge comes from online info
6.5 CM is flatter shooting at longer distances. probably advantageous at long distance shooting. ammo availability and price is considerable also
have you considered other calibers like 6mm ARC or any other of the newer calibers?
Me no huntah.

I mean I wouldn't mind the opportunity, but not my thing. If I did, I'd probably stick with .308 or something specific to the range and
beast animal. At this point in my life, the only stuff that really interests me are pest control. I have a buddy just outside Houston that helps a couple of ranchers with pest control for feral hogs. Another friend (somewhat lost touch with him though) in ND who does prairie dogs. They have these rotating shooting benches and look for the "pink mist". The prairie dogs are pests there and IIRC are a hazard for the livestock there. I'd also get a much lighter gun. My bolt action is pretty hefty.
Yup, the 6.5 interests me for shooting in the 600-1000+ yard distances. One aspect is commercial ammo availability, as well as it's pretty common caliber overall.
I have somewhat considered other 6mm varieties. 6x47, 6.5x47, 6 mm ARC, etc. I was planning on doing more research, but I may be ordering a second custom action soon, so that spurred this line of thinking. Still not set on 6.5 Creedmoor, but really interested. I want to stick with a caliber where brass (and boolits to a certain extent) is readily available. Primers are also a consideration. I have a good amount of LRP, where I can get brass for 6.5 CM for LRP. Maybe in the future when SRP becomes more available, I'll expand. I also am not into any wildcat calibers, at least not right now.