Out to 400 yards, the difference in trajectory between the 150 and 165 bullet weights isn't really enough to nitpick over. It takes a stiff charge to get a 180 to shoot that flat, but its possible as Federal High-Energy with 180 gr bullets will shoot as flat as standard 150 gr loads. 165 and 180 gr bullets don't drift as much in the wind, but out to 400 yards, its not really enough to worry about. I know I can't hold within an inch or two at 400 yards in the field. Good thing a deer has a 10 inch vital zone, right?
With a 30-06 at ranges from 0 to 400 yards, the biggest issue will be bullet expansion. You want something that will hold together at close range. You will also want something that will still expand at longer distances. The Nosler Ballistic Tip is my favorite on deer because I don't care about saving rib meat. I want rapid expansion with lots of damage to the vitals. I hunt in an area where shots within 100 yards are rare. Because most of my shots take place between the 200 and 400 yard line, I want something thin jacketed that will open up at those ranges. The Ballistic Tip opens up nice at those ranges. I like the 150 gr Nosler Ballistic Tip at around 2900 to 2950 FPS out of my M70 with 24 inch barrel. Bucks wind very well, only drops about 18 inches at the 400 yard line.