| .500 Whisper |
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| Type | Rifle |
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| Place of origin | USA |
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| Designer | SSK Industries |
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| Parent case | .378 Weatherby Magnum |
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| Case type | belted, bottlenecked |
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| Bullet diameter | .510 in (13.0 mm) |
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| Neck diameter | .549 in (13.9 mm) |
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| Base diameter | .582 in (14.8 mm) |
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| Rim diameter | .579 in (14.7 mm) |
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| Rim thickness | .063 in (1.6 mm) |
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| Bullet mass/type |
Velocity |
Energy |
| 750 gr (49 g) AMax |
1,050 ft/s (320 m/s) |
1,837 ft⋅lbf (2,491 J) |
|
| Source(s): SSK Industries, Ammo.org |
The .500 Whisper or .500 Whisper Short Belted is a subsonic rifle cartridge developed by SSK Industries for use in suppressed rifles. It is capable of firing a .51 caliber bullet weighing 750 gr (49 g) at roughly 1,050 ft/s (320 m/s).