Excellent write up.
I have a rear-grip 18" 6.5-284. I went with a mild load of H-4831 (50.5) and the 147's = 2520 fps
With a different 6.5-284 (center-grip clone XP-100 action) that has a 17" barrel, 49.5 grains of H-4350, and I use the 140 grain AB, and my MV is 2784 fps.
We initially ran the center-grip faster, and it shot great: 10-shot group at 100 yards
Thought this might be interesting
I have a friend who has done a lot of tissue testing (Whitetail and hogs) the last couple of years with both the 130 ELD-M, 140 ELD-M, and the 147 grain ELD-M in the 6.5 Creed (several different rifles).
The 130 grain kills good, but they hardly ever had a exit.
140 ELD-M exits and does a good job of killing. He is not a fan of the 130 grain ELD-M
The 147 grain ELD-M performed the best in terms of killing, but the internal trauma , length the animal would go on the shot, etc was just a tad longer/trauma a bit less than the 308 Winchester would with Hornady TAP ammo /168 grain A-Max or the newer 168 grain ELD-M.
On another note, the ELD-M's (at least with the 168 grain 30 cal) is a bit softer than the old 168 grain A-Max.
He basically does autopsies to see what was hit and the trauma to the tissue, and attempts to compare apples to apples as much as possible.