Artillery range, 1st Century AD

[jvrjenivs]

I seem to remember 400 meters, without any accuracy, and 150 meters with considerable accuracy. I may be completely wrong.

I think this are good figures, but depending on the machine I think some can reach over 500 meters for sure. Also I don't believe most machines were used in the 45 degrees distance shooting like many re-enactment displays shows. I think they are really build for straight and accurate shooting. A ballista stone will only damage a wall when shoot straight agains it, not under an angle. Then I think about 150 to 200 meters are the max.