The Regulator Guy
Novice
With shotguns you can one shot bears and sirens, but you have to be very close to them. And that's with level 1 or 2 double barrel. That's how it was in the beta at least. i haven't yet played this version but I don't think they altered the values. The semi auto shotgun does less damage but has higher rate of fire, but even with that if you're very close as in, in their face level of close you can one shot them with that as well. Again, this is how it was in beta. Once I got level 5 guns I stopped testing them as the damage was very high and I was using the bow primarily. Which can also one shot if you loose the arrow at the correct time.
Interesting. The targeting reticle only seems to go out five or six yards, so maybe there's just a whole lot of spread even when something is technically in range.