Dumb new Lapua brass question

[Mesa1978]

Do you know this for a fact? A company policy might be to box from the same batch and machine as much as possible, for quality control.

Yes, I have variations in neck tension with .223, 6.5 Grendel, 6.5 Creedmoor and .308 within multiple boxes of Lapua new brass. If from a single machine, tolerances are not held for 100 cases at a time. OAL varies, as well, as does primer pocket tension. Lapua is better than other makes of brass in the cartridges I have listed, attribute wise, but not perfect out of the box. Carrier handling, I assume, is also a variable in neck concentricity/roundness, sometimes necks will have flats in the mouths from new boxes of Lapua. Great brass, but not perfect out of the box if you want accuracy.