Учите мат часть) For Mosin was a lightwight ammo with a half of powder. Undersounded. Speed of bullet was slow then sound 300 m\s. They was special for "Bramit" and painted green . Shooting with silencer " Bramit" by usual ammo is strongly restricted. Cos they are deastroy a rubber layers in silencer.
So "Bramit" in russian БРАМИТ - Братья Митины , Mitin Bros are inventors of it.
Range of fire with a special weak ammo is bout 300 meters.
That is very intersting. I did not realize these green sub-sonic (partisian load as we refer to it) rounds were used with a silencer. I thought they were just for reduced noise. Do you have any pictures of one of the original silencers?