Once prepped, I've had just as much luck out of LC cases as I have Lapua in AR's and a Tikka T3X. That being said, I've gotten past the point of only trying to make small groups of holes in paper, so the individual chasing tiny groups may see a benefit from Lapua cases.
I've found that LC cases, once you remove the primer crimps, uniform the primer pocket, debur the flash holes, and trim to the same OAL, they become very nice/consistent cases. I know some guys go as far as weighing/sorting cases, but I never have bothered.
Great thing is, you're not too heartbroken if you lose one on the range or in the field. In fact, I've had similar results with Win/WCC and PMC cases, at least once you do the prep work. Add a Wolf primer, 77gr SMK, and 23.8 TAC or 24gr Varget, and you will have a sub MOA load out of just about any decent rifle.
