357 Magnum in European police use

Hello all
Can you please help me finding what kind of loads GIGN and GSG-9 use in their .357 Magnum revolvers (Manurhin MR-73 and SW 686, respectively)?
Also, whct kinds of revolver ammo French police used in their Manurhin Special Police F1 revolvers?
I’m specifically looking for basic specs (bullet weight and MV), but even a name of the load would help