What is the .300 Whisper?

The .300 Whisper is a wildcat pistol cartridge in the JDJ cartridges family.

What bullet diameter does the .300 Whisper use?

The .300 Whisper uses a bullet diameter of 0.308 inches.

The .300 Whisper has a Rimless, Bottlenecked case type.

The .300 Whisper uses a Small rifle (.175") primer.

The JDJ cartridges family includes the .300 Whisper and other related cartridges. Browse the full family on OpenCartridge.

Pistol Wildcat

Dimensions (inches)

Parent Cases

.221 Fireball

.221 Remington

Community Load Data

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Powder (name or brand)

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No load data submitted yet for .300 Whisper.

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