RNG hasn't blessed me with a blackhammer yet on the ps4 (I have one on the 360 though). That being said, I'm not sure this ruins the blackhammer. They didn't take away the infinite perk, they just pull it from your reserve, correct? Everybody should have a metric sh*t ton of green ammo synthetic from chests and poe. Just think ahead and pop a green before the boss or whatever. That gives you max ammo, plenty for at least 2 rounds of atheon, or any of the poe or vanilla bosses.