I bought 100 Lapua cases when I first started reloading. They are the only cases I used (I have 20 brand new Lapua in my system for a newer Partition load I worked up but they are not mixed with the first 100) but they don't always get an even distribution of use, which is to say some get recycled more often than the others. One load in particular gives me 3000fps from a 150grain Hornady Spire Point and I've shot a lot of these.
When I started out I bought 1,000 primers and I've used all of them plus a few more. Given this I would say that you should easily get 10 reloads on the Lapua brass and I would say that some of mine must have at least 15 on them. I have had one cracked neck but should highlight that when I started out I had some problems with a neck sizing die so these cases have seen a fair bit of experimentation and, probably, needless resizing. I have now dumped some of the cases that I knew to be on about the same number of cycles as the case with the cracked neck but this was more caution than need and I sectioned one of the cases and saw no sign of any thinning of the brass towards the head.