most legendary hand cannons are actually fine ammo reserve wise. my vanity for example has 8 rounds in the chamber and 83 in reserve without any ammo capacity upgrade perks, and receives 25-40 rounds per ammo pack depending on my activity. exotic handcannons however are an entire different story. every single exotic handcannon has about 15-20 rounds less than a legendary which also impacts greatly how much ammo they get from each ammo crate. makes just about every exotic handcannon useless in pve.