.510 Whisper
The .510 Whisper (13×47mm) 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).
The .510 Whisper (13×47mm) 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).
The .510 Whisper (13×47mm) 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).
Source: Wikipedia ".510 Whisper" · CC BY-SA 4.0
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