Pg. 23 Run & Gun. Ammo is a -
In the core book in the desc of crossbows it lists then with a 4 shot magazine.
disagree. there's nothing in the stat block for any of the crossbows (light/medium/heavy) regarding to ammo capacity. there's nothing specific that says pistol crossbows do not obey the standard rules for crossbows at all.
if it meant that they only held one round, it would say it only held one round, exactly as the harpoon gun directly above it is written.
pistol crossbows follow the existing rules for crossbows