The main caliber of the German Köln cruiser of the Nazi Kriegsmarine is a 150-mm gun (the barrel length is 60 calibers) C/25 (shell weight 45.5 kg, firing range 25.7 km).
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The main caliber of the German Köln cruiser of the Nazi Kriegsmarine is a 150-mm gun (the barrel length is 60 calibers) C/25 (shell weight 45.5 kg, firing range 25.7 km).