9x39mm Russian
  New in the USA in 2018: (Per Wikipedia, not me)
The 9x39mm is based on the Russian 7.62×39 mm round, but with an expanded neck to accommodate a 9 mm (.356 caliber) bullet.
The cartridge was beginning to be designed in the 1940s by a team of a supposed 27 unknown members, but was later finished by N.
Zabelin, L. Dvoryaninova and Y. Frolov of the TsNIITochMash in the 1980s.
The intent was to create a subsonic cartridge for suppressed firearms for special forces units that had more power, range and penetration
than handgun and some rifle cartridges.
The 5.45×39 mm cartridge introduced in 1974 for the AK-74 lacks sufficient bullet weight (at 53 gr to 80 gr) for acceptable energy at
subsonic velocities.
The bullet of the 9×39 mm is approximately 16 g (250 gr), double that of the normal 123 gr 7.62×39 mm round, and is subsonic.
This slow velocity does not produce a sonic boom, but does limit the muzzle energy and effective range of a weapon when compared to
non-suppressed rifles.
The round has an effective lethal range of 400 to 530 meters and a maximum penetration of up to 10 mm of steel. Like the 5.45×39mm
cartridge, 9×39mm SP-5 features an airpocket in the tip, which improves its capability to yaw after impact, and thus increase its effect on
soft tissue.
The 9x39mm cartridge and some of it’s weapons are currently being banned in some war zones due to the unethical and “overpowered”
nature of the round. There is a bill being put in place named “The Vladikavkaz 9x39mm Subsonic Round Restriction Certificate“ and is
unknown if it will continue to stay in effect. Not much is known of this certificate.
Military, Police & Sporting Cartridges