What is the 6 mm Whisper?

The 6 mm Whisper is a wildcat pistol cartridge in the JDJ cartridges family.

What bullet diameter does the 6 mm Whisper use?

The 6 mm Whisper uses a bullet diameter of 0.243 inches.

The 6 mm Whisper has a Rimless, Bottlenecked case type.

The 6 mm Whisper uses a Small rifle (.175") primer.

The JDJ cartridges family includes the 6 mm Whisper and other related cartridges. Browse the full family on OpenCartridge.

Pistol Wildcat

Dimensions (inches)

Bullet Ø	0.243
Case Length	0.375

Parent Cases

.221 Fireball

Community Load Data

Filter Loads

Bullet Type

Powder (name or brand)

Min MV (fps)

Max MV (fps)

No load data submitted yet for 6 mm Whisper.

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