Quick Look
The .300 Whisper cartridge was developed in the early 1990s for suppressed, subsonic shooting. It emphasizes versatile performance with subsonic and supersonic loads, offering quiet operation and effective terminal ballistics. It remains popular among tactical shooters and hunters seeking low-noise, precision rounds.
Why It's a Top Choice
- Excellent subsonic performance for suppressed firearms
- Versatile with both subsonic and supersonic loads
- Compatible with .221 Remington Fireball bolt faces
- Effective, low-recoil round for hunting and tactical use
Key Variants
300 Whisper Subsonic
Ideal for suppressed shooters desiring near-silent operation with heavy, slow-moving bullets for enhanced terminal effects.
300 Whisper Supersonic
Designed for higher velocity loads providing flatter trajectories and longer effective range.
Competitor Comparison Table
| Feature | 300 Whisper | 300 AAC Blackout | 7.62x39mm |
|---|---|---|---|
| MSRP | Varies by manufacturer | Varies, generally affordable | Economical and widely available |
| Capacity/Size | Standard rifle magazines (varies) | AR-15 magazines compatible | AK-47 magazines |
| Weight | Light recoil, moderate bullet weight | Similar, with subsonic options | Heavier recoil, higher bullet weight |
| Optics-ready | Dependent on host firearm | Widely optics-compatible | Varies by rifle platform |
| Trigger Type | Varies by rifle | Varies by rifle | Varies by rifle |
| Notable Pro | Exceptional subsonic versatility | Strong AR compatibility | Widely available and proven |
| Notable Con | Limited mainstream rifle ammo support | Patent restrictions historically | Heavier recoil and less efficient subsonics |
Best Use Cases
- Suppressed tactical operations
- Hunting small to medium game
- Precision target shooting
- Home defense with low noise
- Plinking and range practice
FAQs
Can I use .300 Whisper in AR-15 rifles?
Yes, AR-15 rifles chambered for .300 Whisper require barrels with the correct chamber and bolt face, similar to .223/5.56 bolt patterns.
What is the difference between .300 Whisper and 300 AAC Blackout?
Both cartridges are similar and compatible in many rifles, but 300 AAC Blackout has standardized SAAMI specs and broader commercial support.
How does subsonic .300 Whisper perform?
Subsonic loads travel below 1,100 fps, enabling quiet shooting with heavy bullets ideal for suppressed firearms and close-range use.
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