"..don't you want to get the bullet out as far as possible without hitting the land and grooves of the gun to make the rounds custom to your gun and more accurate."
Well, we all want more accuracy. But it's false that all rifles, or even most, shoot best with the bullets at the lands.
It's also not true that any book or factory OAL is a rule that has to be followed or something bad will happen.
Find both a powder charge and seating depth that works from the magazine and without jamming bullets into the lands. Most sporting rifles seem to shoot best with bullets from maybe thirty thou off the lands to as much as four times that much.