I came across these fired cases of Russian silenced / silent weapons and thought you may like to see them.
l. to r.:
9x39 = SP-5, SP-6 and PAB-9 (this one needs a silencer, all others below are gas captive systems)
7.62x35 = SP-3
7.62x42 = SP-4
7.62x63 = PZAM
7.62x63 = PZA (predecessor of PZAM, screw locked primer)
9x93 = PFAM [color=red] EDIT: (for long steel projectile)[/color]
9x93 = PMAM [color=red] EDIT: (propelling cartridge with separating pushing rod and different inner construction, intended to fire a 30mm Grenade )[/color]
On the 9x93 types the designation is not 100% confirmed.