Palmer lets Harley take care of 2V, and takes Furiosa' advice not to shoot. He's showed the creatures that he can defend himself, which is what he wanted to do anyway.

He follows Harley and 2V as ordered, letting Furiosa cover them. She can handle herself, he thinks as he keeps his gun close. He still has a few shots left in case he'll need them. They have to prepare for anything. Those creatures are still after them.

"What I wanna know is how they got a hold of those guns."