Jimmy didn't plan to kill them all, the cargo handlers were small fry, to get a big haul, he had to keep someone alive for interrogation, so his first round of fire targeted non-lethal areas.
But Jimmy completely underestimated the ferocity of these people. They kept shooting back while hiding behind various shelters, and even when they got shot, they didn't completely give up.
Seeing this situation, Jimmy gave up as well. He pulled out the revolver Python, aimed at someone who showed their head, and fired a shot, instantly killing one person. "Nick! Ah~~" Seeing their own get killed, the person hiding with him behind cover seemed overly shocked, and stood up spreading bullets wildly toward Jimmy's general direction.
Jimmy fired two more shots from the side of the cover, and the shooting instantly went silent.
