RE: Trying to understand the lands?
If you are not cutting the smoke at 2.310 and you were at 2.325 with the bullet seated in a resized case, you should start somewhere shy of 2.310 like bc said. What he also said about the lands possibly pulling the bullet back out of the case sloghtly using the split-neck method is correct. I think you have a good starting point to work off now.