Used in the VSS, AS, SR-3, S-3M, VSK-94, 9A-91, AK-9 and a bunch of other guns.
Hopefully probably maybe uses the right dimensions.
Seriously though, the projectile has iffy dimensions I took from photos, and the casing uses dimensions I found online. I can not assure that it is made to specs.
Primer pocket is 5.37 mm (0.2114") in dimater. Will fit large primers.