.300 Whisper

.300 Whisper is a rifle cartridge or ammunition model.

In detail

.300 Whisper is a rifle cartridge or ammunition model.

Sources

Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.

reference work · Reputable secondary · Wikipedia
“.300 Whisper”, English Wikipedia, consulted as further reading
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reference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q4545250: .300 Whisper
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