Exactly that he will not find everything, because some parts of the comic are out of print. The publisher is doing reprints, but before the demand for one is covered, the other is running out ...
Did any of them have?

Even trained people would not do headshots while driving the car on uneven surfaces.

As for ammunition - sometimes you can see that the heroes run out.
If it were not for the divine efficiency, the heroes would never have escaped from the farm with such a flood of zombies and low personal losses.

If you haven't noticed it yet, chatting is one of the foundations of this series. Please note how much space the creators devote to interpersonal contacts and showing their reactions to various events.
1. As in a computer game. // spell
2. They must have "softened" skull bones from decay or something like that.