I hunted jacks for years with everything from Class 3 type weapons to deer rifles. I remain convinced, that in tall sage/close cover a tight patterning 12 gauge auto or pump is perfect. If distance is involved, a nice .223 auto with an aimpoint type optic or low/variable scope on it. I won't print the stories of my now deceased buddy who ran around in bib overalls, pop bottle glasses, and a 180 series Mini 14 with open sights and how far away he used to kill running jacks....consistently.... .22 lr just don't get it done with fairness to the animal when they are running, this coming from a guy that killed a hundred a day with a .22 in my younger years, and most required running down for a coup de grace (sp).
Just my .02 cents. Wish they would come back some day.
RR