I purchased two hundred Lapua cases before I knew they were made shorter. Literally all but one measured one and seven hundred fourty three thousandths. The one was longer and also an extra, it was cut down the neck to make a seating depth comparator.
All worked as advertised. My chamber is a touch longer than usual, so the shorter cases leave a bit of residue that can build up in front of the neck. The carbon ring is scrubbed out after every two hundred round cycle with a bit of Flitz.
As long as they are all consistent they should work fine. May I inquire what you are shooting them though?
Shooting them thru a Rem 700 tactical & an encore pistol 15" bbl.