The 175 is a gun. A gun shoots a flatter trajectory than a howitzer. Think of a gun in relation to a pitcher throwing a fast ball and a howitzer as throwing a pumpkin. Although a howitzer can fire "straight" for most missions the round goes almost as high as is does far. A tank is a gun (read rifle, flat shooting).
For you sports fans, think of taking a 3-point shot in basketball, sure you can hit the rim if you throw it hard, but you are much more accurate if you loft it.
This is not "scripture" but it is the basic idea of how artillery works.
Trav
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Godspeed and keep low!
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