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| จาก Seh Daeng Hardcore |
The 300 Whisper® is a new concept in the development of small case capacity, highly efficient cartridges combined with bullets of extreme ballistic efficiency.
The 300 Whisper® was designed for the purpose of firing extremely heavy, accurate, ballistically efficient bullets at sub-sonic velocities and is now the state of the art long range cartridge in suppressed weapons. It delivers more energy more accurately than any existing sub-sonic round at 200 yards {and a lot further} (except other Whispers®). In addition, it has interesting sonic capabilities - possessing greater versatility than any other cartridge capable of performing in these vastly differing arenas.
Powder charges are very small allowing the use of small suppressors. The 240 grain Sierra Matchking launched at a muzzle velocity of 1040 FPS/576 foot pounds energy arrives at 200 yards with a velocity of 976 FPS/508 FPE while maintaining minute of angle accuracy from bolt action rifles and many autos. Suppressed, most of the "noise" heard by the firer is that of the firing pin striking and action "tightening up" under the stress generated. With suppressors there is some small amount of muzzle noise. In this mode there is no audible sound made by the bullet as it is under the speed of sound and does not generate a sonic boom. Unsuppressed, with heavy bullets, the sound of firing is less than that of a 9MM pistol.
Sub-sonic as well as sonic accuracy is maintained with bullets weighing 125, 150, 168, 180, 190, 200, 220 and 240 grains from the same barrel. 200, 220 and 240-grain sub-sonic bullets usually tumble shortly after impact creating wounds far in excess of their "paper" ballistics. Special purpose projectile ammunition is also available on special request. A "helmet puncher" is now under development.
"Upper" receivers for the AR-15/M-16 made by SSK utilize 100% AR-15/ M-16 parts with the exception of the 30-caliber barrel and gas system. The gas system may be a fixed system which operates the weapon normally or an adjustable four position system which incorporates a cut off for very silent operation in the suppressed sub-sonic mode, a port which develops a rate of fire in full auto of about 750 RPM, another for operation under dirty conditions to assure reliability and another special purpose port. Pulling the pins and replacing the original "upper" unit with the SSK Whisper® unit converts the AR-15/M-16 to 30 caliber. Standard M-16 magazines are used. Accuracy, power and control of the weapon in full auto sub-sonic mode is simply unmatched by any other weapon of this type. In sub-sonic sub-machine gun mode, it far exceeds any other similar purpose sub-machine gun cartridge and weapon system.
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| จาก Seh Daeng Hardcore |
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