Mettenheim Bolts are the most powerful crossbow ammunition in the game. Using this will make any crossbow wielder exceedingly more effective, and a line of crossbowmen using this ammunition can help to shatter any army's advance. This item can be rarely found in merchant shops and can be rarely looted from those who carry it. You can improve these bolts at Alexios of Melitine to increase their number to 34 in the bag.
Troops that use this ammunition include: