So, here's the result of all the wisdom, sarcasm and heartfelt advice...
Decided to go with the 6.5 Creedmoor at the end of the final auditions. I was getting a random flyer with the 6CM I could not explain. The 6.5 is shooting bugholes with SD's under 5. Using Peterson SRP brass, H4350, 143 ELD x, and a Fed 205M primer.
I was able to sneak to 330 yards of a 9 year old ram. The steep uphill angle needed almost .3 mil correction. He was bedded, and when he stood up I had a slightly quartered broadside. The first shot was a solid hit right where I was holding. He humped up and turned the opposite direction. I bolted the rifle and hit him a second time in pretty much the same place on the opposite side. That round piled him up and he fell about 30 feet into a tree
Both rounds had full penetration and the exit holes were about an inch I would guess. In this instance, the rifle, round and bullet all performed fantastic. The more I shoot the mid-bore rounds, the better I like them. I certainly did not "needmoor".
The hunt was hot, miserable, grueling and AWESOME! Keep applying, you never know...