I wouldn't worry about kissing the lands or just being off them, most guns will shoot just as well (sometimes better) with a good bit of jump to the lands. What I generally do is start with the bullet seated to published OAL, then try seating it further in or out in 0.005" increments until I find the sweet spot for that bullet/barrel combo. Generally speaking though, if you're already getting consistent 1/2 to 3/4" groups the extra effort really isn't worth the minimal amount of gain you'll see unless you're striving for the absolute smallest groups possible for competition.
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