Gamo is sleezy-lame.... couldn't even see where the hog was hit.
He said in the video that the rifle was classified as a child's toy which is totally false. I believe you must be 18 years old to purchase them in the majority of locales.
I have a little bit of experience hunting hogs with airguns. I hunt them with a big-bore .45 airgun, but have also seen them hunted with .22 and .25 caliber airguns that are at least 3-4X's as powerful as the "Gamo Hunter Extreme" (but still only half as powerful as a .22LR) shooting far superior pellets than those crap alloy Gamos). Every report I have heard on those alloy Gamo pellets says that they are useless.
On the hunt where the .22 and .25 pellet guns were present, there were a couple of hogs taken with them. Also a couple that were just wounded to run off. However, the size of the hogs taken with the .22 and .25 airguns was limited to under 50lbs. On a hog this size, the more powerful (60-90fpe) .22 and .25 can reliably penetrate the skull of real small hogs up close IF YOU HIT THE RIGHT SPOT. There is zero margin of error with the small-bore .22 and .25's even on very small pigs with brainshots (not just a "headshot" but a brain the size of a golfball).
One guy dis-obeyed the rules, and shot a 135lb boar in the ear twice with a 45fpe .22 pellet gun. The hog did drop but when he returned with the ranch owner to pick up the hog, they found that it was paralyzed, yet still alive, and the rancher put it down with his carbine. The ranch owner felt the pellets had penetrated just enough to touch the brain but could not do enough damage to the brain to kill the hog.
If you want to hunt hogs with an air-powered gun you need to get a big-bore air rifle, preferably a custom job .45caliber or bigger. These are good for brainshots on any sized hog, and other shot placement on whatever size hog appropriate for the individual gun's power level.
I used a 228grain slug at 700fps on this wild hog this last May in Oklahoma; he weighed about 80+lbs and made for some fine eatin'. He was about 15-20yards away. It proved to be enough slug for the job, and my air rifle was the least powerful one on this hunt.
You can read more about the all-bigbore airgun hog hunt I put together last May 19-21st by checking out the post I made in the Hog hunting section here on Graybeards, or go to this site and read the hunt story.
The four of us all killed our hogs (my boar was the smallest) with a single .45 slug to the brain; none took a single step. No wondering about where I hit this hog.http://www.hardcorebigbore.com/