This is going to sound very basic to some folks , Paul , Tom and Adam who are more aware of British guns . Can anyone please educate me as to the British "Pounder" equates to in German MM's. eg 2 pounder = ??mm 6 pounder = ??mm 17 pounder =??mm. 25 pounder = ??mm. This has always been something of a mystery to me , it has just never sunk into my dense head. thanks in advance.