SSK's Whispers®

03/26/04

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NEW: 300 Whisper Forums!

After considerable frustration on my part, I have finally managed to get a new forum up and running. The forum includes two areas, one for area for 300 Whisper rifles and pistols and a second for reloading and ammo issues. I have a huge number of visitors that come to these pages each day so please drop in the forum and say "Hi" and share your projects!

I wish to give credit to Ben Broughton for being the author of the following.
Please visit Ben's Suppressed Rifle Cartridges Page.

6.5mm Whisper

Designed by J.D. Jones in the early 1990's, this cartridge is intended for use in sound-suppressed AR-15's, bolt-action rifles and T/C Contenders. Based on the .221 Fireball case. Bullet diameter is .264 inches.

Supersonic loadings defeat the design purpose of this round but are available and do provide increased velocity, energy and penetration at the expense of greater noise.

7mm Whisper

Designed by J.D. Jones in the early 1990's, this cartridge is intended for use in sound-suppressed AR-15's, bolt-action rifles and T/C Contenders. Based on the .221 Fireball case. Bullet diameter is .284 inches.

Supersonic loadings defeat the design purpose of this round but are available and do provide increased velocity, energy and penetration at the expense of greater noise.

.300 Whisper

Designed by J.D. Jones in the early 1990's, this cartridge was the first of the Whisper cartridges and is intended for use in sound-suppressed AR-15's. The .300 Whisper is probably the most versatile of the Whisper series cartridges. It is based on the .221 Fireball case. Bullet diameter is .308 inches.

Supersonic loadings defeat the design purpose of this round but are available and do provide increased velocity, energy and penetration at the expense of greater noise. This cartridge has found limited use in some SWAT and Special Forces units.

.338 Whisper and .338 Whisper #2

There are actually two versions of the .338 Whisper. The original .338 Whisper is based on the 7mm Remington Benchrest case, which simplifies conversion of rifles that use .308 Winchester case head dimensions (.470").

The .338 Whisper #2 is based on the .221 Fireball case. This allows easier conversion from rifles originally chambered in .223 Remington, such as the AR-15 and variants.

.375 Whisper

The .375 Whisper is based on the 7mm Remington Benchrest case, which simplifies conversion of rifles that use .308 Winchester case head dimensions (.470"). The .375 Whisper may fare a little better as a hunting round than its .338 sibling, but in just about any other area, the .338 has it beat largely because of the wider variety of bullet types available for it.

.510 Whisper

The .510 Whisper is intended to provide unmatched long range energy from a suppressed rifle, with the additional possibility of firing .50 BMG payloads at subsonic velocities. The .510 Whisper is based on the 338 Lapua cartridge, trimmed to 2" and necked to accept .500" bullets.

Capable of MOA accuracy at 600 meters, the .510 Whisper can be used for light anti-vehicle/materiel work with the proper payload.

 

 

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This page was last updated 03/07/06