Re: A different kind of long range g-hog hunting
I think you will find that ALL animals react in a different way. That hog has the instinct to get to that hole. When a hawk circles, he will run (very fast) to the hole.
You are correct, the deer did not hear that noise factor and will normally drop in their tracks. An elk on the other hand will either drop or just lay down.
The woodchuck is a rather tough and strong little animal for his size. Comparing muzzle energy needed as per size of the animal, it may just take more then a 22 Rimfire especially at 200 yards, to keep that chuck from reaching his hole. At 200 yards you don't have much energy left, even as you said, when they are hit in the head they can make it back to the hole.
Take care and good shooting