Re: 338 lapua bullet seating!
A little more info needed to give a meaningful answer. What bullet weight are you using (dictates length to some extent)? Do you want to load from a magazine or just single feed rounds?
For best accuracy, the consensus seems to be that just off the lands works well for VLD type bullets, but I have tended to jam my loads in a few thou.
Whatever way you go, ignore the AOL in the loading manual as its a pretty arbitrary figure.