25mm x 163mm Japanese anti aircraft round

[browningautorifle]

We just had a gunshow here, the big one for the year. Not well attended by the normal gun guys, we had a whole row less of tables this year. It's still only big at about 450 tables... Anyway, I got a couple things for the ordnance collection, one being a Japanese 25mm X 163mm anti aircraft round. A friend sells curio and knew I liked this stuff. Here's the blurb on it...

The Type 96 25mm Gun was an automatic cannon used by the Imperial Japanese Navy during World War II. A locally-built variant of the French Hotchkiss 25 mm anti-aircraft gun, it was designed as a dual-purpose weapon for use against armored vehicles and aircraft, but was primarily used as an anti-aircraft gun in fixed mounts with one to three guns.

The Type 96 cartridge case was a rimless type design with a deep extraction groove at the base. The projectiles fired by the weapon were slightly unusual in that they had two rotating bands. The forward band was slightly smaller in diameter than the rear band. It was believed that this was to reduce wear on the rifling near the chamber. The case of the cartridge was crimped around the rear rotating band. The complete round weighed approximately 820 g (1.81 lb) with the projectile weighing 320 g (0.71 lb).

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