It's very unclear from the picture how these were shot, but you might want to consider that—contrary to a lot of first person shooters, including Valve games—the bullets in this game physically come from a mostly accurate position around your gun and then travel towards the vanishing point. They are not magical straight lines that fly out from "the middle of your face or camera".
So the position/distance of your gun in relation to surface/entity that's being shot has a pretty significant impact.