The .300 Whisper is a specialized rifle cartridge designed by J.D. Jones of SSK Industries in the early 1990s. It is notable for its versatility in various shooting applications, particularly in subsonic and supersonic performance.
Key Features:
1. Design and Development: Created for use in both AR-15-type rifles and bolt-action rifles, the .300 Whisper is based on a necked-up and fire-formed .221 Remington Fireball case.
2. Bullet Types: It can be loaded with a wide range of bullet weights, typically ranging from 110 grains to 250 grains, making it adaptable for different purposes.
3. Subsonic Performance: When loaded with heavy bullets (e.g., 220-240 grains), the .300 Whisper can be fired at subsonic velocities (~1,050 feet per second), making it ideal for use with suppressors, significantly reducing noise.
4. Supersonic Capability: It can also be loaded with lighter bullets to achieve supersonic velocities, suitable for longer-range shooting and higher terminal performance.
5. Use Cases: Its quiet operation with subsonic ammo makes it popular in tactical applications, hunting (especially with suppressors), and specialized shooting competitions.
However, it is worth noting that the .300 Whisper requires careful handloading to achieve its full potential due to its versatility.
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Lee Collet Necksizing 2-Die Set |
Lee RGB Die Set |
Lee Full-Length Sizing Die Set |
Lee Breech Lock Die Set |
Lee Ultimate 4-Die Set |
Lee Loader |
Single Dies |
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Full-Length Sizing Die |
Sizing Die |
Neck Sizing Die |
Undersize Sizing Die |
Charging Die |
Seating Die |
Factory Crimp Die |
Taper Crimp Die |
Inline Bullet Feed Die |
Case Conditioning Tools |
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Case Length Gauge and Shell Holder |
90493 |
Quick Trim Die |
Presses |
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Reloader Press (50 RPH) |
90045 (Lee Reloader Press) |
Hand Press (50 RPH) |
Breech Lock Hand Presses |
Challenger Press (50 RPH) |
90588 (Challenger III) |
Classic Cast Press (50 RPH) |
90998 (Classic Cast Press) |
Value Turret Press (250 RPH) |
90928 (Value 4-hole Turret Press Kit) 90932 (4-hole Turret Press with Auto Index) |
Classic Turret Press (250 RPH) |
90304 (Classic Turret Press Kit) 90064 (Classic Turret Press) |
Ultimate Turret Press (250 RPH) |
91910 (Ultimate Turret Press) |
Pro 1000 Press (500+ RPH) |
Pro 4000 Press (500+ RPH) |
90900 (Auto Breech Lock Pro) |
Six Pack Pro Press (500+ RPH) |
91823 (Six Pack Pro Reloading Press) |
Shell Plates and Holders |
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Priming Tool Shell Holder |
90204 (#4) |
Universal Press Shell Holder |
90521 (R4) |
X-Press Shell Holder (APP) |
91537 (#4) |
Pro 1000 Shell Plate |
Auto Breech | Pro 4000 Shell Plate |
90630 (4) |
Six Pack Pro Shell Plate |
91838 (4S) |
Inline Bullet Feed |
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Inline Bullet Feed Die |
Inline Bullet Feed Kit |
Inline Bullet Feed Magazine |
Bullet Casting |
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Classic Bullet Sizing Kit |
Breech Lock Bullet Sizer and Punch |
Bullet Molds |
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