You are over complicating and over thinking the issue.
The beauty of the 30-06 is it's versatility.
Load the 150 gr. bullets if you want to, they will be very accurate. A 170 gr. MatchKing might win the 200 yard bench match but you won't be far behind.
For each type of shooting, keep your brass sorted by brand. Argue about brand difference if you want to but there isn't much difference. Personally, I prefer Winchester for heavy loads because it is a bit thinner and I can squeeze in a couple more grains. For all-purpose use military brass can't be beat. Thick and reloadable many-many times.
You will hate the hand press, get a bench press.