Antlers-
Allthough I don't currently have a 264 WM, The cartridge has always intrigued me. I am sure I will someday find a gun for it. Now, my 243 covers some of the game that this 264 could replace and do better at. I know there are a few factory loads, but it is really a reloaders cartridge. I love the higher weight, higher sectional density bullets that can be used in the 6.5 mm diameter.
So sorry, I am not the bucket of information you are looking for, but I too seem to think this cartridge could be a great whitetail/mule deer getter. BuzzKill