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| rdfs:comment | - The .338 Whisper is a wildcat cartridge in the Whisper family, a group of cartridges developed in the early 1990s by J.D. Jones of SSK Industries. Unlike the smaller caliber cartridges in the Whisper family, loads for the .338 Whisper are mainly limited to subsonic velocities.
- There are two versions of the .338 Whisper: 1.
* The original .338 Whisper is based on the 7 mm Remington Bench Rest case, necked up (enlarged) to take a .338" bullet. As the 7mm Bench Rest and .308 Winchester cases share the same case head dimensions, conversion to .338 Whisper from a rifle previously chambered in .308 Winchester (or any cartridge based on the .308 Winchester case, such as .243 Winchester, .260 Remington, 7 mm-08 Remington, etc...) is a relatively simple task. 2.
* The second version (called .338 Whisper #2 by SSK) is based on the .221 Remington Fireball case, simplifying conversion of firearms chambered in 5.56x45mm or its commercial counterpart, .223 Remington.
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| abstract | - The .338 Whisper is a wildcat cartridge in the Whisper family, a group of cartridges developed in the early 1990s by J.D. Jones of SSK Industries. Unlike the smaller caliber cartridges in the Whisper family, loads for the .338 Whisper are mainly limited to subsonic velocities.
- There are two versions of the .338 Whisper: 1.
* The original .338 Whisper is based on the 7 mm Remington Bench Rest case, necked up (enlarged) to take a .338" bullet. As the 7mm Bench Rest and .308 Winchester cases share the same case head dimensions, conversion to .338 Whisper from a rifle previously chambered in .308 Winchester (or any cartridge based on the .308 Winchester case, such as .243 Winchester, .260 Remington, 7 mm-08 Remington, etc...) is a relatively simple task. 2.
* The second version (called .338 Whisper #2 by SSK) is based on the .221 Remington Fireball case, simplifying conversion of firearms chambered in 5.56x45mm or its commercial counterpart, .223 Remington.
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