If someone with a scoped Moisin-Nagant has a bead on anyone, anywhere,m at any time, that is a problem. Fortunately, most decent snipers will be more on the defense side than offense. Zombies move in hordes rather than thoughtfully, at least in the movies and for the most part in real life.
That’s why integral suppressed 1022s work to disperse the pali hordes. Drop a few int he front line and the followers tend to be unable to climb the pile. BUT when they do, their higher profile is a welcomed sight for the sites.