only thing i could even think of the dread can hit with from a screen away @_@ is the homing ball,
nothing else should even go that far i think/from my own fight, so mebe another instance of bugged reach/“lightning tech” ? 
it’s canister bomb
GT doesn’t list such skills with included fragmentation as 1 projectile+ x projectiles, just like Canister bomb and PRM doesn’t either, it’s just not the way the tooltips/descriptions work
Whether it’s supposed to shotgun with frags or not is then a different matter/“deciphering”, and GT doesn’t always get every secondary effect/template effect interaction right etc