What is the .311 Imperial Magnum?

The .311 Imperial Magnum is a rifle cartridge.

What bullet diameter does the .311 Imperial Magnum use?

The .311 Imperial Magnum uses a bullet diameter of 0.311 inches.

The .311 Imperial Magnum has a Rimless, Bottlenecked case type.

The .311 Imperial Magnum uses a Large Rifle (.210") primer.

Rifle

Case Type	Rimless, Bottlenecked
Primer	Large Rifle (.210")

Dimensions (inches)

Bullet Ø	0.311
Rim Ø	0.519

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Cartridges with the same bullet diameter (0.311")