They are getting more interesting all the time. I am sure the day will come when they get honest big bore speeds and performance from an air rifle. Until then I think its still in the stunt category shooting very large game (bears, bison etc). The animals in the photos obviously died, we just don't know how long that took.
"The difference between adventure and disaster is preparation." "The problem with quoting info from the internet is that you can never be sure it is accurate" Abraham Lincoln
Eric Henderson probably has more big bore airgun hunting experience then anyone on the planet. He has been at it for a very long time, has worked with Dennis Quackenbush developing hi power air rifles for years. A long time air gun hunter, his exploits have paved the way for many of us who now own .308, .458, and .50 cal Quackenbush rifles. Dennis Quackenbush sells one of the most sought after airguns on the market today. He builds them in small lots in his one man shop, much in the same fashion as the old English gun makers a century ago. His reputation has been made by producing a good working rifle that gets the job done, not by hype. A whole cottage industry has sprung up producing big bores, Dennis started 30 years ago. It is not uncommon for a Quackenbush rifle to sell for double the price of a new one. Many are waiting just for the chance to get on his waiting list.
Nothing like dropping a 400gr slug in the breech, and sending it on its way. The big boom, recoil, and the smack of lead hitting the target. A Whitetail does not stand a chance against one of these. Their not the air gun you had in your youth. Buffalo might not be for everyone and would not be my choice of target. Black bear are easy enough to kill with a bow or muzzle loader. The .50 cal shoots a round ball same as a black powder rifle without the mess, the .458 is 400gr at 850fps. not far behind a 45/70 trap door carbine loaded with black powder.