What is the 6.45 mm Walther Ultra?

The 6.45 mm Walther Ultra is a pistol cartridge, introduced in 1930's.

What bullet diameter does the 6.45 mm Walther Ultra use?

The 6.45 mm Walther Ultra uses a bullet diameter of 0.254 inches.

The 6.45 mm Walther Ultra has a Rimless, Bottlenecked case type.

The 6.45 mm Walther Ultra uses a Berdan primer.

Pistol

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Cartridges with the same bullet diameter (0.254")