Lewis and Clark took an air gun with them on their big trip. I forget the web sites, but was looking at one one where 3 guy went on a wild boar hunt and each killed one with and air rifle. While in Alaska a few years back I saw a 9 mm air gun that put a 125 gr. through 1 - 2 x 4 and 1/2 was through the second. You need to find some of the air gun sites, there are some very powerful air guns out there.