wesley123
06-02-2010, 02:15 AM
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.
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.