At first I thought the ramming tip would be good for zombies - head shots make zombies go all asplodey!
But them I saw the flaring tip and thought not only will it destroy their head but burn then to a cinder.
And the bolts tips could be made out of silver, like the crossbow body, but use stout wooden shafts. That way you get protection from not only zombies but werewolves and vampires.
Leaving only the question, what crossbow bolt for clowns?
stay safe.