Wow you must have some wussie groundhogs in Jersey. I have yet to be able to finish one off with a 22. Doesn't seem to phase them. I've also had two havaheart traps DESTROYED by groundhogs. Mangled frames, broken welds, bent doors, etc. I don't even bother with box traps anymore because they've always escaped.
I just can't fathom how an animal with a head that is 3 or 4" across can fit thru a 1" opening between my shed and a concrete block under it at a full run without even slowing down. Freaks of nature. Satan's house pets.
Jim, you actually need to hit them with the .22 bullet, hitting the broad side of the barn next to them won't scare them to death !! Lol
If I can get close enough, my .27 air rifle with a pointed pellet will do them in as well. If I'm bored when it's hot out, I'll open the windows in the garage, throw out some bait and wait till they show up for lunch. I'm talking 10-15 yard shots.
that is one classic movie !! Karl Spackler is the man.