Also complicating matters is the problem that the effect of increased explosives is also not linear. With regard to causing casualties, the effect is sublinear. I'm not sure exactly what the relationship is (Rexford, John Salt?), but having twice as much TNT in the shell does not cause twice as many casualties -- but rather less than twice as many.
The principle behind it is that overkill in the immediate vicinity of the impact is wasted. One person can only become a single casualty, no matter how much explosive power is used to blow him up.
tar got a reaction from Kineas in Medium caliber HE blast values in CMBB
