![]() Around that time an up-and-coming suppressor company known as Advanced Armament Corporation (AAC) took an interest in this round.ĪAC was soon bought by Remington Arms and they worked hand in glove with Remington to produce a new round to address perceived pitfalls regarding the US Military’s 5.56 NATO round.ĭesigners and engineers at both AAC and Remington Defense altered the dimensions of the 300 Whisper by trimming and re-necking 5.56 NATO brass as the parent case instead of 221 Fireball or 222 Remington. ![]() The 1994 Federal Assault Weapon Ban had a major impact on this cartridge and its use in semiautomatic rifles because there were limitations on threaded barrels and muzzle devices to one degree or another.įortunately, this misguided piece of legislation came to an end when the sunset clause of the law took effect in January 2004. SSK trademarked the cartridge and kept it proprietary limiting other manufacturers in what they could produce such as reloading dies, reloading components, barrels or firearms. Jones designed this cartridge with two loads in mind: a lighter bullet being used for supersonic rounds comparable to the energy and ballistics of the Russian 7.62 x 39 or 30-30 Winchester round as well as a subsonic load involving heavier projectiles for use in conjunction with a silencer. SSK formed the cartridge case from 221 Fireball brass and expanded the neck size to load a. ![]() The 300 Blackout cartridge has a history going back to the 300 Whisper round, developed by JD Jones of SSK Industries between the late 1980s and the early 1990s.
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