Re: loading 30/06 spg
I know this will sound a bit crazy, but I will throw it out anyway. I realize you have decided on a powder, but you might give this one a whirl someday and see if it works for you. However it might not be the bullets or weights your looking for.
First off, the best load I have ever put together for both of the rifle you mentioned was the same exact load. It used the following,
58.5 grs of IMR-4350
Nosler 150gr SB, or BT
OAL of loaded rounds 3.250"
Cases trimmed to 2.484
( This load might be max in some rifles. Please work up to is slow. )
This load has shot sub MOA, in going on ten different 06's. Don't ask me why but it has just worked.
As for your original question, You can use the seating depth you used to work up your load and then work closer to the lands in three shot groups or back away from your seating depth the same way. Use .005" increments or .010" increments till you see a size change in your groups. It might be that you will find a good to great seating depth both close as well as away from the lands. It just depends on how much room your after in reguards to loading in a magazine. That was the first consideration I had to go with on working up the above mentioned load. Between my dads 03 A3, and my friends Rem. 700 I wanted something that would work in both. After trying out several different loads, I accidentally hit this one while loading up some rounds for a nephew's Mossberge 1500. It shot so well in that one I had to try it in the others, and have never looked back. It drops deer and hogs like greased lightning out to ranges of 400yds.
Good luck in your endeavers, there are many combo's that work well with this caliber. Also you might do a search on ladder test as well. It might shed some light on your development.
Mike / Tx
"Heck why would I lie, most folks don't believe the truth when I tell them"