RE: Distance To The Lands.......I don't get it!
I notice that this is the first place new reloaders get caught up. then after loading for several calibers, they quickly forget about it. If not done right, it can cause you all kinds of issues. I have seen new reloaders seat so far out that only .15" of the bullet is in the case, and the bullet is easily knocked around. I have seen them with severe pressure spikes on occasion due to jamming in the lands. Seen guys on hunting trips that worked hard on reloads to show up in the middle of nowhere that find out they can't put thier bullets in the magazine cause they never did tried it.
I mean its a good question to ask and find out. But I highly suggest you don't sweat it too much. Its the least of the your worries. Just make sure your not in the lands for one, and make sure you can fit your bullets in the mag two.