A Repeater Bolt Thrower is a war machine and all the rules governing war machines apply. Repeater Bolt Throwers may either shoot a single bolt or they may fire multiple shots.

If using the multiple shots option then the Repeater Bolt Thrower shoots six bolts in each Shooting phase. These shots are worked out exactly like shots from bows or crossbows, using the Ballistic Skill of the crew to determine whether the bolts hit or not. All bolts must be directed towards a single target. Multiple shots have a Range of 48", a Strength of 4, with armour saves suffering a -2 penalty.