I find the whole thing so unlikely heh - quite likely to find reloads, etc. when scavenging in that kind of world and not really likely to pay much attention to the spent shell case let alone notice details on a pistol sized calibre from any distance.
As said, it's not surprising that he'd check, given that as far as he is concerned he has totally disarmed them, not to mention got them so scared that no one would dare try anything anyway. Of course he'd be curious.
But yes, it is for the purposes of the plot, and we are now deviating away from the comics which make more sense in this front.



