Typically, the deeper a bullet is seated the less pressure and velocity will be generated. Reference the following chart from Barnes
September 2007 Barnes Bullet-n | Barnes Bullets
where the first loading on the left in each caliber is closest to the lands and going to the right they are seated deeper by .050". The pressures are generally lower as the distance from the lands increases.
Also this graph which I don't know the origin of
Hornady also documents this with some explanation of
Internal Ballistics - Hornady Manufacturing, Inc
"To illustrate the effects of variations in bullet travel before the bullet enters the rifling, we'll compare a standard load with adjustments made only in the bullet's seating depth.
In a "normal" load with the bullet seated to allow about one 32nd of an inch gap (A) between the bullet and the initial contact with the rifling, pressure builds very smoothly and steadily even as the bullet takes the rifling. Pressure remains safe throughout the powder burning period (B), and the velocity obtained - 3500 fps - is "normal" for this load in this rifle.
Seating the bullet deeper to allow more travel before it takes the rifling, as in these next two illustrations, permits the bullet to get a good running start (C). Powder gases quickly have more room in which to expand without resistance, and their pressure thus never reaches the "normal" level. Nor does the velocity; with the same powder charge it only comes to 3400 fps (D).
When the bullet is seated to touch the rifling, as in the accompanying illustrations, it does not move when the pressure is low (E); and not having a good run at the rifling as did the other bullets, it takes greatly increased pressure to force it into the rifling. As the rapidly expanding gases now find less room than they should have at this time in their burning, the pressure rise under these conditions is both rapid and excessive (F). Velocity is high at 3650 fps - but at the expense of rather dangerous pressure. Many rifles deliver their best groups when bullets are seated just touching the rifling. Seating bullets thus can be done quite safely if the reloader will reduce his charge by a few grains. The lighter load will still produce the "normal" velocity without excessive pressure. "
All this being said, pressures will also depend largely upon the size of the combustion chamber in your rifle. IOW, if you have a long throat that exta volume at the long leade will be a part of the equation that dictates pressures so you have to use the prologue "All other things being equal....................."