Gman I haven't done this kind of stuff for 15 years or so, so I'm a little out of date on the ammo. I always used my friend's guns, Marlin .22, 10-22, and an 870 in case we had flying targets or fast movers like jackrabbits.

All the places we used to hunt are now suburban sprawl anyways.

Edit: Thinking back I can see the need for better ammo. A lot of times we would have them frozen, but then as we moved for a closer shot (between our lousy shooting and the light Stinger bullets we needed to be inside 50 yds, preferably 25 yds) they would sound the alarm and all run in their holes.