I'm still trying to figure out why your considering 200 gr bullets at 2700 fps out of an 06' as a dedicated "long" range mule deer load.
Load up some high BC 150's at 3000fps or so, or some 165's at 2850-2900. THEN your talking a dedicated long range muley load.
Sometimes your logic baffles me.
Given equally accurate loads, the 200-gn Accubond at 2740 fps is a significantly superior long range load to a 165-gn NBT at 2900 fps or a 150 at 3000 fps. I'm not talking drop, nor retained energy here... talking wind drift mainly. Drop is easy to correct, etc.
However, I don't know if I'll be able to get both that kind of speed with the 200's and great accuracy. That's still an unknown. My last try with RL17 yielded as-advertised speed (in my .325) but not great accuracy.
Anyway I won't argue against the 30-06. I love my 30-06; it's on it's second barrel as a 30-06, if that tells anything... I've run at least (400) 165-gn NBT's through that rifle in the last year, mostly at longer ranges, and you bet, they work. I would tend to agree that 165's are near-nirvana in a 30-06... but RL17 may goose the 200-gn enough to change things a bit.
And finally.... the rifle loon in me can't help but figure ways that I could do this job
better than the 30-06, which happens a lot, I gather, to other loons too.