Ya, I was looking at this part which seems like I would WIN, but possibly grayish on the last part not sure?! QUOTE (In a rifled barrel, the distance is measured between opposing lands or grooves; groove measurements are common in cartridge designations originating in the United States, while land measurements are more common elsewhere.)
I feel like I may win one and lose one so no gain and no glory! I really have learnt something on this subject who would of ever thought.
2nd QUOTE
( The effective length of the barrel (from breech to muzzle) is divided by the barrel diameter to give a value. As an example, the main guns of the Iowa class battleships can be referred to as 16"/50 caliber. They are 16 inches in diameter and the barrel is 800 inches long (16 x 50 = 800). This is also sometimes indicated using the prefix L/; so for example, the most common gun for the Panzer V tank is described as a "75 mm L/70," meaning a barrel 75 mm in diameter, and 5250 mm long.)