I'm not sure I agree that seating into the lands will make an inaccurate load. Lots of benchrest shooters make their living engaging the lands with every round. It will darn sure make one that tends to run higher pressure than one that does not engage the lands.
Optimum bullet seating depth is dependent upon your chamber and throat length and what you are doing with the rifle.
If you are a benchrest shooter, you'll likely be seating hard into the lands with little or no neck tension, but then again you single load and never have to unload a chambered round.
If you have a long lead/throat on your chamber, like every Remington I've ever heard of, you'll want to seat your bullets so the ogive sits roughly .015 to .025 from the lands (the optimum is rifle dependent). The only way to know how far you are from the lands is to use a Stoney Point OAL guage or similar tool that allows you to determine exactly how far each of your bullets are seated into the brass when they physically engage the lands at the ogive.
You do this several times and you'll have a number with that patricualr size and brand of bullet (the Lapua 155 is different from the Sierra 175, and is different than the Sierra 168.
My Redding Competition Micrometer Seating Die is adjustable in 0.001 increments so that I can adjust the seating depth in those same increments.
It sounds like BC has found this distance with his 1/4 turn approach, which is excellent and I'm sure a lot less of a hassle than what I've been doing with mine.
JeffVN