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IMPERIAL MILITARY .30" UP TO .399" /
300 WHISPER
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IMPERIAL MILITARY .30" UP TO .399"
300 WHISPER
300 · 12 headstamps · 6 scans
| Calibre | 300 |
| In the cabinet | IMPERIAL MILITARY .30" UP TO .399" · 18 images |
Reading the headstamp
12 o'clockMaker's name or factory code
6 o'clockCalibre or year of manufacture
CentrePrimer — Berdan or Boxer, and any seal colour
Research notes
The history and development of the 300 Whisper/Blackout have been discussed HERE.
The AAC 83 headstamp in 5.56x45 and 7.62x51 was a made by Igman of Yugoslavia for Nordac Manufacturing Corp. (NMC) in Fredericksburg, Virginia, and the initials stand for "American Armaments Corporation". This was a deceiving contract intended for El Salvador. BHA is by Black Hills Ammunition Co., Rapid City, SD with cases made by Starline. C B is also by Cor-Bon Ammunition Co., Sturgis, SD. The LEHIGH headstamp shows that it can be either for the Blackout or the Whisper. SSK is by SSK Industries, Wintersville, OH. The D B initials on the STEWART headstamped specimen was for a South African shooter, Dave Brooks. This is a very early headstamp.
Provenance
2017Catalogued in the collection
2026Record last revised · 2026-01-03
Same drawer
