How to increase the range of an artillery piece from a ballistic point of view

Look at what kind of gun, if it is a mortar, then you find a higher place to open a gun in the sky on the OK~~

If it is a grenade gun, then naturally forty-five degrees will be farther away, the fact is that in a certain range range, and does not necessarily have to pursue the farthest to hit, because now there are a variety of weapons, there are various kinds of range weapons ladder configuration, each kind of weapon in its own role, to hit the accurate more important, of course, if it is far away and accurate and powerful, it is better to be more accurate. If it is far and accurate and powerful, it is better.