Thanks Guys,
Just what I was looking for!
I knew this was going raise some discussion over "What is Optimal", but I know that some calibre's perform better with different weights. I can't recall a 270 owner telling me he prefered the 150 to the 130, yet I know of no one with a 30/06 who would prefer the 150 to the 165. It just works better!
Actually one guy I know has only ever used 150's in his 30-06s no matter what his quarry. He is no weekend warrior either. From his three rams to high country Elk and bears I'd put him in my mentor list any day.
Go from him to the fellow who actually taught me the ropes said thee ONLY bullet to use in the 06 is the 180gr. My Great Uncle only shot this weight ever. Having said that, I think used 165gr the most for the few years I carried that chambering in either the Speer, or more often the Hornady Interlock and Grand Slam a couple times.