As the Corporeal beast has 2,000 hitpoints, in theory Ruby bolts (e) would be capable of hitting a 400, assuming no hitpoints from the Corporeal beast was lost. However, it has been capped at a maximum of 100 to prevent the bolts from being overpowered. Note that the max hit with ruby bolts (e) is a special effect of the bolts, not due to equipment bonuses and ranged level.