I seriously doubt a 22LR will kill a ground hog at 200yds. At least not the same day, unless it's a solid head shot, and that is a near impossibility to achieve. I understand the OP's quest, but if it has to be a rimfire step up to the WMR. Much better for the given task, with 30gr bullets up to 2200+ and 40gr at 2000-2100, better bullets etc.

Of course with todays ammo issues, getting ANY 22LR might be a a challenge.