Warning on Jap type 89 tank

[Weasel]

Told ya it was screwed up:

Description (From wikipedia)

The Chi-Ro (YI-GO) had a crew of 4 (commander/gunner, loader, driver and hull gunner). The turret was armed with a 57 mm main gun and a 6.5 mm machine gun mounted in the rear of the turret. There was another 6.5 mm machine gun mounted in the front of the hull.

The Type 89 main gun was the Type 90 57 mm Tank Gun with caliber of 57 mm, barrel length of 0.85 m (L14.9) el angle of fire of -15 to +20 degrees, AZ angle of fire of 20 degrees, muzzle velocity of 380 m/s ,penetration of 20 mm/500 m

Now, the FT17 (we were playing Japan vs Manchuka) has a 37mm L21 Type 11 which can penetrate 5mm of armour at 500m. (these stats were actually for the type 21, couldn't find the type 11) ( http://www.tarrif.net/cgi/production/all...on_adv.php )

so why can it penetrate a tank at 100m but the type 89 requires a target to be in the same hex, when the type 89 gun is 4X better?