RE: Trying to understand the lands?
I believe you are looking at it correctly.
Looks to me like that bullet in the first pic is seated way too far out-perhaps by as much as one bullet diameter. Matter of fact, I'm surprised you didn't end up w/the bullet stuck in the chamber throat and an action fulll of dumped powder when you extracted the round!
You need to seat the bullet deeper in the case, to an additional depthequal to where the the top of the land marks will beeven with about where the BOTTOM edge of the land marks are in that top photo.....The bullets should be sdeated to where they are about 1-2mm shy of allowing the lands in the bore to actually touch them when the bolt is closed. SOME rifles shoot better with even more clearance betwen the lands & the bullet when the bolt is closed......