IF it chambers in you gun why would you resize it? Firing it the first time = fire forms it to YOUR chamber. Now it may need to be chafered or mouths opened on the dented from shipping ones that wont take a bullet. Thats why I ONLY shoot Lapua when I have a choice! Just load them up and shoot them, then take the time to do it right the next time when you have them fire formed!
You should be able to see if it will chamber without loading anything, and I agree if it will chamber load it and shoot it! Full length sizing new brass is probably costing you 1 firing in its lifetime, after the first fire buy you a neck sizer and save yourself alot of trouble.
Lapua brass is awesome, I've never found a dinged up neck in mine.