Precision...

[NTJedi]

Saber Cherry said:
Nobody knows. And I mean nobody. But with precision below 10, sometimes projectiles go backwards Whereas precision 30 tends to hit quite often at long range.

This is one of the many things which should be explained within the manual. Too often we've seen some little cute history next to a spell or item when it should of had listed the important facts for what it does. I have faith Dominions_3 will do it right. Facts first... History... Last.