How to shoot hoverballs

[Birdus]

to hit hoverball, you need to be able to shoot them with a normally arcing weapon. so, you aim at the enemy, then do 8/7 power less than 100

[The Looker]

Or, if these other replies look like an alien language, just shoot as if the shot is going to land in front of him. It will hover for a bit at the top of its arc, then hit the enemy.