Seafire, I too use a 22-250 for long range work on rock chucks. I load 50gr BT with IMR4350. These perform remarkably well in my Rem. 700 22-250. I also have spots to hunt these vermin that I share with no one. Their populations are good but lots of shooting will diminish them quickly. I truly enjoy hiking to lofty meadows to pursue them. My old 22-250 has a factory SS bbl. that I picked up on the internet. This is a fluted heavy contour Rem. bbl. that has taken more than its' share of mtn. chucks. A 22-250 or 22-250AI is more than adequate if the wind is not blowing too much. Otherwise I would recommend a .243 shooting perhaps a 65gr Vmax or 70gr. BT. Good luck with your long range quest.
