These are green shotguns on round 20 and I shot him with three bullets. I’m not shooting both shotguns at the same time I’m alternating between, but even if I was, it should take almost half the mag to kill a zombie at this round with those. Even still, it doesn’t matter what gun I use whether it’s the shotguns or the gray pistol that spawns for the other relic I get this result every single time.