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On 14 July 2017, the UK Ministry of Defence issued a tender for a five year (plus five years optional) contract to supply .300 Blackout supersonic and subsonic small arms ammunition. Also noted was the fact that the ammunition type had already been in use.
The .300 Whisper (7.82×34mm) is a CIP standard [1] cartridge in the Whisper family, a group of cartridges developed in the early 1990s by J.D. Jones of SSK Industries.It was developed as a multi-purpose cartridge, capable of utilizing relatively lightweight bullets at supersonic velocities as well as heavier bullets (200–250 grains) at subsonic velocities.
Alternatively, specialized firearms and ammunition may be used to optimize total subsonic ammunition effectiveness. These are designed from the start as dedicated subsonic projectile systems. Some examples include .300 Whisper, 300 AAC Blackout, .338 Whisper, 8.6mm Blackout, 9×39mm, 12.7×55mm STs-130, .500 Whisper, and .510 Whisper.
Ammunition: 12 gauge ... of the 7.62mm rifle suppressor. the 300 BLK Long (designed for use with the 300 AAC Blackout cartridge in both subsonic and supersonic.
.300 AAC Blackout: 2011 ... CQB as a sub sonic round. Supersonic is also available. .300 H&H Magnum: ... and special powder to approach .308 ballistics from a ...
The United States will fly a supersonic bomber over ally South Korea as part of a massive combined aerial exercise involving hundreds of warplanes, in a show of force meant to intimidate North ...
The Whisper family of firearm cartridges is a group of wildcat cartridges developed in the early 1990s by J.D. Jones at SSK Industries.The Whisper family was developed as a line of accurate, multi-purpose cartridges using relatively heavy rifle bullets for a given caliber in subsonic loads.
Boom Supersonic’s XB-1 aircraft is aiming to break Mach 1.1 speed today (28 January) (Boom Supersonic) Almost 22 years after Concorde made its final commercial flights, a prototype passenger jet ...