Ive done for a few ground hogs with headshots under 15 yards. 44 of 45 lead ball. Hardest part is being that close and being able to draw without being seen. Mine have all been in my gardens. I hide in the corn or sit in a row of tomato vines like a blind. Saves my beans and its a fun way to spend warm summer evenings.I think with a hexnut or some big lead balls, inside 10 yards, yes you can.. Give me a few days and I'll tell you for sure.. Got a brute of a hog around and I'm gonna get him soon.But groundhogs are notoriously hard to kill.. So we shall see.