Increases the amount of time enemies will stay juggled in the air while you shoot them.
For example, 5 seconds is average time for champion. If a rune of 8% ballistics juggle time is added the juggle time looks like this.
5 * 0.08 = 0.4
0.4 + 5 = 5.4
5.4 is the new ballistics juggle time.
Bonus Cap: +100%