Think of them as a short-tail ground squirrel, maybe 3/4 the size of your usual tree squirrel.
If a colony hasn't been shot over a lot, it's not hard to drive slowly, stop, shoot at ranges from maybe 50 to 300 yards and move on and repeat.
Some folks get elaborate, with shooting tables in the backs of pickups and custom tack drivers for games way out in Ma Bell country.
Flat to gently-rolling country means many available shots in the 300- to 400-yard range.
A .17 Mach II works to 100 yards, but it takes some figuring for wind and holdover to hit at 200. Doable, and effective.
I was doing fine with a .223 to 300, with maybe five or so inches of holdover from a 200-yard zero; allowing about five and six inches for wind, that day. 200 yards? Piece of cake.
Half-MOA is quite desirable.