I would expect they would be using magnum primer for those heavily compressed loads with the high pressures.
magnum primer in 9mm Luger? AA No.7?? no need. And likely no benefit. Magnum primers aren't about how compressed the load is they're about igniting difficult to ignite (slow) powders. AA No. 7 isn't a slow pistol powder.
And, my personal feeling is that anyone who is providing loading data without providing the primer, and case used or the gun it was tested in isn't telling us enough.