a .22 hornet would be pretty sweet I think for PD's too.
I've killed the most with a 10/22. some out there quite a ways as well. a little kentucky windage can go a long way when you have a 10 round mag and can adjust quick if you miss.
at the place I go in SD we usually start with .22s for the first half a day or so, stalking through draws and crawling over small ridges. later on we sit up on top of a hill with a .223 or similar rifle and pick em off from a ways away. I use a savage 110 .223 in a thumbhole stock and a burris signature 6-24 ballistic mildot scope. helps that I reload my own too so I have plenty of .223 ammo.
Beware of any old man in a profession where one usually dies young.
