Pellet Gun for ground hog | New Jersey Hunters- pellet guns for hunting groundhogs ,18/8/2011· Joined May 2, 2011. ·. 7,997 Posts. #14 · Aug 18, 2011. Depends on the pellet gun. Adult air rifles are very powerful today. I have a .25 caliber air gun that would kill any groundhog at 50 yards. There are many PCP air rifles that approach 22lr power without the noise. That being said your pump pellet gun from Walmart is not the best weapon.Will an air rifle kill a groundhog? : HuntingI'm going to say 25-30 ft. lbs of energy for a clean kill on a groundhog. For example, a Crosman hollowpoint .177 pellet @1200 fps will give you ~32 ft. lbs of energy. If your air rifle can do 25-30, then go for it. Here's some 411 for you: I once blasted a groundhog at 10 feet with a shotgun loaded with birdshot.