I'm looking at the rules and I don't see any reason why they wouldn't, but the implications are failry intimidating since it means the Screamer of Tzeench does 1d10+14 impact damage with it's force bolts with a range of 70 meters making every shot close range in any likely scenario therefore rolling BS of 45 after making it's focus power tests at WP75.
Pretty brutal considering the **** things are going to be having their way with most of the party the first few rounds since they'll most likely have to make a fear check at -40.