I am up early on a Saturday morning, at least early for me. I was thinking about the past as I often do, and believe it or not, the clearing of live ammunition came to mind. Before you fall down laughing, remember my medical conditions, I often "slip back" to my Navy days. In any case, there are times when a naval gun, any version, will fail to fire. That is called a misfire. The resulting condition is called a "Foul Bore". This can be a very dangerous situation if the gun barrel is hot enough to "Cook Off" the ammunition contained in the gun barrel. Thus, the Navy wrote an entire tech manual for "Clearing of live ammunition from Naval Guns, OP 1591". In any case, most times, if the powder did not fire, and all systems check satisfactory, you must remove the powder case and replace it with another. In some cases, the projectile may not have seated all the way, or there may be other reasons, that the Mount Captain, the senior Gunner's Mate in the gun, decides to use a "Short Charge". A "Short Charge" is a powder tank that is substantially shorter in length than the operational powder cases. This allows for any number of issues in the breech including an improperly seated projectile or even trapped air between the projectile and the incoming powder tank. But here is the reason to write this post;
It is a little know fact, but the "Short Charge" has the same amount of propellant powder as the regular length powder! The round will go just as far with a "Short Charge" as with a full charge. I am willing to be most folks, even Gunner's Mates, don't know that!
Now a "Short Charge" is NOT to be confused with a "Reduced Charge" which actually has less propellant powder and is used for special firing situations, ie shooting behind mountains.